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Walker
Walker Products AftermarketWalker 350-34621 Oxygen Sensor
| Brand | Walker 350-34621 |
|---|---|
| Position | Downstream, Downstream Left, Downstream Front, and Downstream Right |
| Wiring Harness Length | 21.18 |
| Wire Gauge Measurement | 22 |
| Sensor Type | Heated |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Connector Shape | Radiused polygon |
| Connector Gender | Male |
| Thread Diameter | 18.0 |
| Overall Length | 24.72 |
| Mounting Type | Threaded |
| Product line | Walker Products Aftermarket |
| Fits | BMW · 585 vehicles |
OE replacement. Engineered for a specific application and diagnostic feedback.
Heated sensor. Helps maintain accurate air-fuel monitoring.
Threaded mount. Installs with a secure, direct-fit connection.
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BMW Oxygen Sensor Replacement
Walker Products 350-34621 is a heated oxygen sensor built as a specific-fit OE replacement for select BMW applications. It is engineered to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions performance on the listed downstream positions.
For BMW 650i, X5, X6, 750i, and related models, this sensor addresses downstream oxygen sensor service needs with application-specific fitment and connector design.
Key Features
- Heated oxygen sensor for faster operating response
- Specific-fit design for the listed BMW downstream positions
- 4-wire configuration with 22-gauge wiring
- Radiused polygon male connector for application-matched connection
- 18.0 mm thread diameter and threaded mounting type
- Wiring harness length: 21.18 in.; overall length: 24.72 in.
Product Details
Walker Products Aftermarket 350-34621 is part of the Walker Products Engine Management and Oxygen/Air-Fuel sensor line, developed as an OE-style replacement for worldwide vehicle applications. This sensor is designed for the specific position on the vehicle and provides the feedback required by the ECU for proper system monitoring. It is used on downstream oxygen sensor locations across a wide range of BMW models, including 2006-2019 BMW 650i, 750i, X5, X6, and Z4 applications listed in the fitment data.
This part cross-references OE-style replacement applications for the same vehicle positions.
What It Helps Address
- Check engine light related to oxygen sensor faults
- Poor fuel economy caused by inaccurate exhaust feedback
- Rough engine operation tied to sensor signal issues
- Elevated exhaust emissions from a failing downstream sensor
- Stored ECU fault codes for the affected sensor circuit
Installation Notes
Verify the exact BMW year, model, and sensor position before installation. Inspect the sensor wiring harness and connector for physical damage, and confirm the threaded mounting location matches the vehicle application. Because fitment varies by bank, cylinder group, and side, use the listed downstream right, downstream left, downstream front, or downstream positions exactly as shown in the fitment data.
- Fits 2015-2019 BMW 650i Gran Coupe, downstream right
- Fits 2015-2019 BMW 650i Gran Coupe, downstream left
- Fits 2015-2019 BMW 650i xDrive Gran Coupe, downstream right
- Fits 2015-2019 BMW 650i xDrive Gran Coupe, downstream left
- Fits 2015-2019 BMW X6, downstream right
- Fits 2015-2019 BMW X6, downstream left
- Fits 2015-2018 BMW 650i, downstream right
- Fits 2015-2018 BMW 650i, downstream left
- Fits 2015-2018 BMW 650i xDrive, downstream right
- Fits 2015-2018 BMW 650i xDrive, downstream left
- Fits 2015-2018 BMW X5, downstream right
- Fits 2015-2018 BMW X5, downstream left
- Fits 2015-2017 BMW 550i GT xDrive, downstream right
- Fits 2015-2017 BMW 550i GT xDrive, downstream left
- Fits 2016 BMW 550i, downstream right
- Fits 2016 BMW 550i, downstream left
- Fits 2015-2016 BMW 550i xDrive, downstream right
- Fits 2015-2016 BMW 550i xDrive, downstream left
- Fits 2015-2016 BMW 750i, downstream right
- Fits 2015-2016 BMW 750i, downstream left
- Fits 2015-2016 BMW 750i xDrive, downstream right
- Fits 2015-2016 BMW 750i xDrive, downstream left
- Fits 2015-2016 BMW Z4, downstream front
- Fits 2015 BMW 550i, downstream right
- Fits 2015 BMW 550i, downstream left
- Fits 2015 BMW 550i GT, downstream right
- Fits 2015 BMW 550i GT, downstream left
- Fits 2015 BMW 750Li, downstream right
- Fits 2015 BMW 750Li, downstream left
- Fits 2015 BMW 750Li xDrive, downstream right
- Fits 2015 BMW 750Li xDrive, downstream left
- Fits 2010-2015 BMW 760Li, downstream right
- Fits 2010-2015 BMW 760Li, downstream left
- Fits 2011-2014 BMW 550i, downstream right
- Fits 2006-2014 BMW 550i, downstream left
- Fits 2010-2014 BMW 550i GT, downstream right
- Fits 2010-2014 BMW 550i GT, downstream left
- Fits 2010-2014 BMW 550i GT xDrive, downstream right
- Fits 2010-2014 BMW 550i GT xDrive, downstream left
- Fits 2011-2014 BMW 550i xDrive, downstream right
- Fits 2011-2014 BMW 550i xDrive, downstream left
- Fits 2012-2014 BMW 650i, downstream right
- Fits 2012-2014 BMW 650i, downstream left
- Fits 2006-2010 BMW 650i, downstream left
- Fits 2013-2014 BMW 650i Gran Coupe, downstream right
- Fits 2013-2014 BMW 650i Gran Coupe, downstream left
- Fits 2012-2014 BMW 650i xDrive, downstream right
- Fits 2012-2014 BMW 650i xDrive, downstream left
- Fits 2013-2014 BMW 650i xDrive Gran Coupe, downstream right
- Fits 2013-2014 BMW 650i xDrive Gran Coupe, downstream left
- Fits 2009-2014 BMW 750i, downstream right
- Fits 2006-2014 BMW 750i, downstream left
- Fits 2010-2014 BMW 750i xDrive, downstream right
- Fits 2010-2014 BMW 750i xDrive, downstream left
- Fits 2009-2014 BMW 750Li, downstream right
- Fits 2006-2014 BMW 750Li, downstream left
- Fits 2010-2014 BMW 750Li xDrive, downstream right
- Fits 2010-2014 BMW 750Li xDrive, downstream left
- Fits 2011-2014 BMW X5, downstream right
- Fits 2011-2014 BMW X5, downstream left
- Fits 2011-2014 BMW X6, downstream right
- Fits 2008-2014 BMW X6, downstream left
- Fits 2009-2014 BMW Z4, downstream
- Fits 2012-2013 BMW 125i, downstream
- Fits 2011-2013 BMW 128i, downstream
- Fits 2012-2013 BMW 325i, downstream
- Fits 2007-2013 BMW 328i, downstream
- Fits 2011-2013 BMW 328i xDrive, downstream
- Fits 2011-2013 BMW 335is, downstream
- Fits 2011-2012 BMW 740i, downstream
- Fits 2011-2012 BMW 740Li, downstream
- Fits 2011 BMW 1 Series M, downstream
- Fits 2008-2011 BMW 125i, downstream front
- Fits 2010-2011 BMW 323i, downstream
- Fits 2006-2011 BMW 325i, downstream
- Fits 2006-2011 BMW 650Ci, downstream left
- Fits 2010-2011 BMW X1, downstream front
- Fits 2006-2011 BMW Z4, downstream
- Fits 2008-2010 BMW 128i, downstream front
- Fits 2006-2010 BMW 130i, downstream
- Fits 2008-2010 BMW 135i, downstream front
- Fits 2009-2010 BMW 328i xDrive, downstream left
- Fits 2007-2010 BMW 335i, downstream
- Fits 2009-2010 BMW 335i xDrive, downstream
- Fits 2010 BMW 525i, downstream front
- Fits 2008-2010 BMW 528i, downstream
- Fits 2009-2010 BMW 528i xDrive, downstream
- Fits 2008-2010 BMW 535i, downstream
- Fits 2009-2010 BMW 535i xDrive, downstream
- Fits 2010 BMW 740i, downstream
- Fits 2007-2010 BMW X3, downstream
- Fits 2007-2010 BMW X5, downstream
- Fits 2008-2010 BMW X6, downstream
- Fits 2009 BMW 760Li, downstream right
- Fits 2007-2008 BMW 328xi, downstream
- Fits 2007-2008 BMW 335xi, downstream
- Fits 2008 BMW 528xi, downstream
- Fits 2008 BMW 535xi, downstream
- Fits 2007 BMW 330i, downstream front
- Fits 2006 BMW 325i, downstream
- Fits 2006 BMW 325xi, downstream
- Fits 2006 BMW 330i, downstream
- Fits 2006 BMW 330xi, downstream
Quality Assurance
Walker Products has supplied engine management and oxygen sensor components since 1946 and manufactures this part under ISO 9001/TS 16949 quality systems. Walker Products 350-34621 is built for application-specific OE replacement use.
This part fits 585 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
| Year | Make | Model | Submodel | Transmission | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|---|---|
| 2019 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2019 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2019 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2019 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2019 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2019 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2019 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2019 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2019 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2019 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2019 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2019 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2018 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2018 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2018 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2018 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2018 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2018 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2018 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2018 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2018 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2018 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2018 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2018 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2018 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2018 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2018 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2018 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2018 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2018 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2018 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2018 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2018 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2018 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2018 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | B1S1; Downstream; Right; Walker Products Aftermarket |
| 2018 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2018 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2018 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream; Right; B1S1; Walker Products Aftermarket |
| 2017 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2017 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2017 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2017 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2017 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2017 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2017 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2017 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2017 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2017 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2017 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2017 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2017 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2017 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2017 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2017 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2017 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2017 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2017 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2017 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2017 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2017 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2017 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2017 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2017 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2017 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2017 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | B1S1; Downstream; Right; Walker Products Aftermarket |
| 2017 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2017 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2017 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream; Right; B1S1; Walker Products Aftermarket |
| 2016 | BMW | 550i | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor for Bank 2 Sensor 2 on right side.; Walker Products Aftermarket |
| 2016 | BMW | 550i | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left side oxygen sensor for Bank 1 Sensor 2 position.; Walker Products Aftermarket |
| 2016 | BMW | 550i | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with bank 2 sensor 2.; Walker Products Aftermarket |
| 2016 | BMW | 550i | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream Left Oxygen Sensor Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2016 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2016 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2016 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2016 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2016 | BMW | 550i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2016 | BMW | 550i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2016 | BMW | 550i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2016 | BMW | 550i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2016 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2016 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2016 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2016 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2016 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2016 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2016 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2016 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2016 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2016 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2016 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2016 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2016 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2016 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2016 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2016 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2016 | BMW | 750i | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2016 | BMW | 750i | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2016 | BMW | 750i | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2016 | BMW | 750i | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2016 | BMW | 750i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2016 | BMW | 750i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2016 | BMW | 750i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2016 | BMW | 750i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2016 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2016 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2016 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2016 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2016 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2016 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2016 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | B1S1; Downstream; Right; Walker Products Aftermarket |
| 2016 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2016 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2016 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream; Right; B1S1; Walker Products Aftermarket |
| 2016 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 4-6; B2S2; Cil 4-6; Downstream; Front; Walker Products Aftermarket |
| 2016 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 4-6; Cil 4-6; Downstream; Front; B2S2; Walker Products Aftermarket |
| 2016 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 4-6; B2S2; Downstream; Front; Walker Products Aftermarket |
| 2015 | BMW | 550i | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2015 | BMW | 550i | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2015 | BMW | 550i | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2015 | BMW | 550i | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2015 | BMW | 550i GT | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2015 | BMW | 550i GT | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2015 | BMW | 550i GT | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2015 | BMW | 550i GT | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2015 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2015 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2015 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2015 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2015 | BMW | 550i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2015 | BMW | 550i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2015 | BMW | 550i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2015 | BMW | 550i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2015 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2015 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2015 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2015 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2015 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2015 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2015 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2015 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2015 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2015 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2015 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2015 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2015 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2015 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2015 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2015 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2015 | BMW | 750i | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2015 | BMW | 750i | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2015 | BMW | 750i | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2015 | BMW | 750i | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2015 | BMW | 750i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2015 | BMW | 750i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2015 | BMW | 750i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2015 | BMW | 750i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2015 | BMW | 750Li | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2015 | BMW | 750Li | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2015 | BMW | 750Li | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2015 | BMW | 750Li | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2015 | BMW | 750Li xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2015 | BMW | 750Li xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2015 | BMW | 750Li xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2015 | BMW | 750Li xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2015 | BMW | 760Li | — | — | 6.0L | V12 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2015 | BMW | 760Li | — | — | 6.0L | V12 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2015 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2015 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2015 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2015 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2015 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Compatible downstream right Oxygen Sensor with bank 1 sensor 2.; Walker Products Aftermarket |
| 2015 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor for bank 2 sensor 2; Walker Products Aftermarket |
| 2015 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | B1S1; Downstream; Right; Walker Products Aftermarket |
| 2015 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream oxygen sensor compatible with right bank 2.; Walker Products Aftermarket |
| 2015 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Left | Bank 2, sensor 2 downstream oxygen sensor; Walker Products Aftermarket |
| 2015 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Downstream; Right; B1S1; Walker Products Aftermarket |
| 2015 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 4-6; B2S2; Cil 4-6; Downstream; Front; Walker Products Aftermarket |
| 2015 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 4-6; Cil 4-6; Downstream; Front; B2S2; Walker Products Aftermarket |
| 2015 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 4-6; B2S2; Downstream; Front; Walker Products Aftermarket |
| 2014 | BMW | 550i | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | BMW | 550i | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | BMW | 550i GT | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | BMW | 550i GT | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | BMW | 550i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | BMW | 550i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | BMW | 650i | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | BMW | 750i | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | BMW | 750i | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | BMW | 750i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | BMW | 750i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | BMW | 750Li | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | BMW | 750Li | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | BMW | 750Li xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | BMW | 750Li xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | BMW | 760Li | — | — | 6.0L | V12 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | BMW | 760Li | — | — | 6.0L | V12 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | BMW | X5 | xDrive50i | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | BMW | X5 | xDrive50i | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | BMW | Z4 | M Sport | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2014 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2014 | BMW | Z4 | M Sport | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2014 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2014 | BMW | Z4 | M Sport | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2014 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2013 | BMW | 125i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2013 | BMW | 125i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2013 | BMW | 128i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2013 | BMW | 128i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2013 | BMW | 325i | — | — | 2.5L | L6 | — | Downstream | Cyl 1-3; OE Replacement |
| 2013 | BMW | 328i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2013 | BMW | 328i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2013 | BMW | 328i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2013 | BMW | 328i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2013 | BMW | 335is | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2013 | BMW | 335is | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2013 | BMW | 335is | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2013 | BMW | 550i | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | BMW | 550i | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | BMW | 550i GT | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | BMW | 550i GT | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | BMW | 550i xDrive | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | BMW | 550i xDrive | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | BMW | 650i | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | BMW | 650i | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | BMW | 650i Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | BMW | 650i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | BMW | 650i xDrive Gran Coupe | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | BMW | 750i | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | BMW | 750i | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | BMW | 750i xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | BMW | 750i xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | BMW | 750Li | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | BMW | 750Li | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | BMW | 750Li xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | BMW | 750Li xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | BMW | 760Li | — | — | 6.0L | V12 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | BMW | 760Li | — | — | 6.0L | V12 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2013 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2013 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2012 | BMW | 125i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2012 | BMW | 125i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2012 | BMW | 128i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2012 | BMW | 128i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2012 | BMW | 325i | — | — | 2.5L | L6 | — | Downstream | Cyl 1-3; OE Replacement |
| 2012 | BMW | 328i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2012 | BMW | 328i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2012 | BMW | 328i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2012 | BMW | 328i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2012 | BMW | 335is | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2012 | BMW | 335is | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2012 | BMW | 335is | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2012 | BMW | 550i | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2012 | BMW | 550i | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | BMW | 550i GT | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2012 | BMW | 550i GT | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2012 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | BMW | 550i xDrive | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2012 | BMW | 550i xDrive | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | BMW | 650i | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2012 | BMW | 650i | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | BMW | 650i xDrive | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2012 | BMW | 650i xDrive | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | BMW | 740i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 4-6; B2S2; Cil 4-6; Downstream; Walker Products Aftermarket |
| 2012 | BMW | 740i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for bank 2 cylinders 4-6.; Walker Products Aftermarket |
| 2012 | BMW | 740i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 4-6; B2S2; Downstream; Walker Products Aftermarket |
| 2012 | BMW | 740Li | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2012 | BMW | 740Li | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2012 | BMW | 740Li | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2012 | BMW | 750i | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2012 | BMW | 750i | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | BMW | 750i xDrive | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2012 | BMW | 750i xDrive | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | BMW | 750Li | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2012 | BMW | 750Li | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | BMW | 750Li xDrive | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2012 | BMW | 750Li xDrive | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | BMW | 760Li | — | — | 6.0L | V12 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2012 | BMW | 760Li | — | — | 6.0L | V12 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2012 | BMW | X5 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | BMW | X6 | M | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2012 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2012 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2012 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2011 | BMW | 1 Series M | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2011 | BMW | 1 Series M | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2011 | BMW | 1 Series M | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2011 | BMW | 125i | — | — | 3.0L | L6 | — | Downstream Front | OE Replacement |
| 2011 | BMW | 128i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2011 | BMW | 128i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2011 | BMW | 323i | Base | — | 2.5L | L6 | GAS | Downstream | Downstream oxygen sensor compatible with cylinders 4-6.; Walker Products Aftermarket |
| 2011 | BMW | 325i | — | — | 2.5L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2011 | BMW | 325i | — | — | 2.5L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2011 | BMW | 328i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2011 | BMW | 328i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2011 | BMW | 328i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2011 | BMW | 328i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2011 | BMW | 335is | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2011 | BMW | 335is | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2011 | BMW | 335is | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2011 | BMW | 550i | — | Manual | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2011 | BMW | 550i | — | Automatic | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2011 | BMW | 550i GT | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2011 | BMW | 550i GT | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2011 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2011 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2011 | BMW | 550i xDrive | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2011 | BMW | 550i xDrive | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2011 | BMW | 650Ci | — | — | 4.8L | V8 | — | Downstream Left | OE Replacement |
| 2011 | BMW | 740i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 4-6; B2S2; Cil 4-6; Downstream; Walker Products Aftermarket |
| 2011 | BMW | 740i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for bank 2 cylinders 4-6.; Walker Products Aftermarket |
| 2011 | BMW | 740i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 4-6; B2S2; Downstream; Walker Products Aftermarket |
| 2011 | BMW | 740Li | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2011 | BMW | 740Li | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2011 | BMW | 740Li | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2011 | BMW | 750i | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2011 | BMW | 750i | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2011 | BMW | 750i xDrive | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2011 | BMW | 750i xDrive | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2011 | BMW | 750Li | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2011 | BMW | 750Li | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2011 | BMW | 750Li xDrive | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2011 | BMW | 750Li xDrive | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2011 | BMW | 760Li | — | — | 6.0L | V12 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2011 | BMW | 760Li | — | — | 6.0L | V12 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2011 | BMW | X1 | — | — | 3.0L | L6 | — | Downstream Front | OE Replacement |
| 2011 | BMW | X5 | xDrive50i | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2011 | BMW | X5 | xDrive50i | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2011 | BMW | X6 | M | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2011 | BMW | X6 | — | — | 4.4L | V8 | ELECTRIC/GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2011 | BMW | X6 | — | — | 4.4L | V8 | ELECTRIC/GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2011 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2011 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2011 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2011 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2011 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2010 | BMW | 125i | — | — | 3.0L | L6 | — | Downstream Front | OE Replacement |
| 2010 | BMW | 128i | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 1-3; Cil 1-3; Downstream; Front; Walker Products Aftermarket |
| 2010 | BMW | 128i | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 1-3; Downstream; Front; Walker Products Aftermarket |
| 2010 | BMW | 130i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2010 | BMW | 130i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2010 | BMW | 135i | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 1-3; B1S2; Cil 1-3; Downstream; Front; Walker Products Aftermarket |
| 2010 | BMW | 135i | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 1-3; Cil 1-3; Downstream; Front; B1S2; Walker Products Aftermarket |
| 2010 | BMW | 135i | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 1-3; B1S2; Downstream; Front; Walker Products Aftermarket |
| 2010 | BMW | 323i | Base | — | 2.5L | L6 | GAS | Downstream | Downstream oxygen sensor compatible with cylinders 4-6.; Walker Products Aftermarket |
| 2010 | BMW | 325i | — | — | 2.5L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2010 | BMW | 325i | — | — | 2.5L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2010 | BMW | 328i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2010 | BMW | 328i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2010 | BMW | 328i xDrive | — | — | 3.0L | L6 | GAS | Downstream Left | Cyl 1-3; Cil 1-3; Downstream; Left; Walker Products Aftermarket |
| 2010 | BMW | 328i xDrive | — | — | 3.0L | L6 | GAS | Downstream Left | Cyl 1-3; Downstream; Left; Walker Products Aftermarket |
| 2010 | BMW | 335i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2010 | BMW | 335i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2010 | BMW | 335i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2010 | BMW | 335i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2010 | BMW | 335i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2010 | BMW | 335i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2010 | BMW | 525i | — | — | 2.5L | L6 | — | Downstream Front | Cyl 1-3; OE Replacement |
| 2010 | BMW | 528i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2010 | BMW | 528i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2010 | BMW | 528i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2010 | BMW | 528i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2010 | BMW | 535i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S1; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2010 | BMW | 535i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; Cil 1-3; Downstream; B1S1; Walker Products Aftermarket |
| 2010 | BMW | 535i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S1; Downstream; Walker Products Aftermarket |
| 2010 | BMW | 535i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2010 | BMW | 535i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2010 | BMW | 535i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2010 | BMW | 550i | — | Manual | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2010 | BMW | 550i | — | Automatic | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2010 | BMW | 550i GT | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2010 | BMW | 550i GT | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2010 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2010 | BMW | 550i GT xDrive | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2010 | BMW | 650Ci | — | — | 4.8L | V8 | — | Downstream Left | OE Replacement |
| 2010 | BMW | 650i | — | Manual | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2010 | BMW | 650i | — | Automatic | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2010 | BMW | 740i | — | — | 3.0L | L6 | — | Downstream | Cyl 1-3; OE Replacement |
| 2010 | BMW | 750i | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2010 | BMW | 750i | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2010 | BMW | 750i xDrive | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2010 | BMW | 750i xDrive | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2010 | BMW | 750Li | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2010 | BMW | 750Li | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2010 | BMW | 750Li xDrive | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2010 | BMW | 750Li xDrive | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2010 | BMW | 760Li | — | — | 6.0L | V12 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2010 | BMW | 760Li | — | — | 6.0L | V12 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2010 | BMW | X1 | — | — | 3.0L | L6 | — | Downstream Front | OE Replacement |
| 2010 | BMW | X3 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2010 | BMW | X3 | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2010 | BMW | X5 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2010 | BMW | X5 | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2010 | BMW | X6 | M | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2010 | BMW | X6 | — | — | 4.4L | V8 | ELECTRIC/GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2010 | BMW | X6 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2010 | BMW | X6 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2010 | BMW | X6 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2010 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2010 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2010 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2010 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2010 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2009 | BMW | 125i | — | — | 3.0L | L6 | — | Downstream Front | OE Replacement |
| 2009 | BMW | 128i | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 1-3; Cil 1-3; Downstream; Front; Walker Products Aftermarket |
| 2009 | BMW | 128i | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 1-3; Downstream; Front; Walker Products Aftermarket |
| 2009 | BMW | 130i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2009 | BMW | 130i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2009 | BMW | 135i | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 1-3; B1S2; Cil 1-3; Downstream; Front; Walker Products Aftermarket |
| 2009 | BMW | 135i | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 1-3; Cil 1-3; Downstream; Front; B1S2; Walker Products Aftermarket |
| 2009 | BMW | 135i | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 1-3; B1S2; Downstream; Front; Walker Products Aftermarket |
| 2009 | BMW | 325i | — | — | 2.5L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2009 | BMW | 325i | — | — | 2.5L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2009 | BMW | 328i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2009 | BMW | 328i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2009 | BMW | 328i xDrive | — | — | 3.0L | L6 | GAS | Downstream Left | Cyl 1-3; Cil 1-3; Downstream; Left; Walker Products Aftermarket |
| 2009 | BMW | 328i xDrive | — | — | 3.0L | L6 | GAS | Downstream Left | Cyl 1-3; Downstream; Left; Walker Products Aftermarket |
| 2009 | BMW | 335i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2009 | BMW | 335i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2009 | BMW | 335i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2009 | BMW | 335i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2009 | BMW | 335i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2009 | BMW | 335i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2009 | BMW | 528i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2009 | BMW | 528i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2009 | BMW | 528i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2009 | BMW | 528i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2009 | BMW | 535i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S1; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2009 | BMW | 535i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; Cil 1-3; Downstream; B1S1; Walker Products Aftermarket |
| 2009 | BMW | 535i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S1; Downstream; Walker Products Aftermarket |
| 2009 | BMW | 535i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2009 | BMW | 535i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2009 | BMW | 535i xDrive | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2009 | BMW | 550i | — | Manual | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2009 | BMW | 550i | — | Automatic | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2009 | BMW | 650Ci | — | — | 4.8L | V8 | — | Downstream Left | OE Replacement |
| 2009 | BMW | 650i | — | Manual | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2009 | BMW | 650i | — | Automatic | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2009 | BMW | 750i | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2009 | BMW | 750i | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2009 | BMW | 750Li | — | — | 4.4L | V8 | — | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2009 | BMW | 750Li | — | — | 4.4L | V8 | — | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2009 | BMW | 760Li | — | — | 6.0L | V12 | — | Downstream Right | Engine Designation : N74; OE Replacement |
| 2009 | BMW | X3 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2009 | BMW | X3 | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2009 | BMW | X5 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2009 | BMW | X5 | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2009 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2009 | BMW | X6 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2009 | BMW | X6 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2009 | BMW | X6 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2009 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2009 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2009 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2009 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2009 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2008 | BMW | 125i | — | — | 3.0L | L6 | — | Downstream Front | OE Replacement |
| 2008 | BMW | 128i | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 1-3; Cil 1-3; Downstream; Front; Walker Products Aftermarket |
| 2008 | BMW | 128i | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 1-3; Downstream; Front; Walker Products Aftermarket |
| 2008 | BMW | 130i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2008 | BMW | 130i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2008 | BMW | 135i | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 1-3; B1S2; Cil 1-3; Downstream; Front; Walker Products Aftermarket |
| 2008 | BMW | 135i | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 1-3; Cil 1-3; Downstream; Front; B1S2; Walker Products Aftermarket |
| 2008 | BMW | 135i | — | — | 3.0L | L6 | GAS | Downstream Front | Cyl 1-3; B1S2; Downstream; Front; Walker Products Aftermarket |
| 2008 | BMW | 325i | — | — | 2.5L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2008 | BMW | 325i | — | — | 2.5L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2008 | BMW | 328i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2008 | BMW | 328i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2008 | BMW | 328xi | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2008 | BMW | 328xi | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2008 | BMW | 335i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2008 | BMW | 335i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2008 | BMW | 335i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2008 | BMW | 335xi | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2008 | BMW | 335xi | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2008 | BMW | 335xi | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2008 | BMW | 528i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2008 | BMW | 528i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2008 | BMW | 528xi | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2008 | BMW | 528xi | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2008 | BMW | 535i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S1; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2008 | BMW | 535i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; Cil 1-3; Downstream; B1S1; Walker Products Aftermarket |
| 2008 | BMW | 535i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S1; Downstream; Walker Products Aftermarket |
| 2008 | BMW | 535xi | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2008 | BMW | 535xi | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2008 | BMW | 535xi | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2008 | BMW | 550i | — | Manual | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2008 | BMW | 550i | — | Automatic | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2008 | BMW | 650Ci | — | — | 4.8L | V8 | — | Downstream Left | OE Replacement |
| 2008 | BMW | 650i | — | Manual | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2008 | BMW | 650i | — | Automatic | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2008 | BMW | 750i | — | — | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2008 | BMW | 750Li | — | — | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2008 | BMW | X3 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2008 | BMW | X3 | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2008 | BMW | X5 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2008 | BMW | X5 | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2008 | BMW | X6 | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2008 | BMW | X6 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2008 | BMW | X6 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2008 | BMW | X6 | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2008 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2008 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2007 | BMW | 130i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2007 | BMW | 130i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2007 | BMW | 325i | — | — | 2.5L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2007 | BMW | 325i | — | — | 2.5L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2007 | BMW | 328i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2007 | BMW | 328i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2007 | BMW | 328xi | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2007 | BMW | 328xi | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2007 | BMW | 330i | — | — | 3.0L | L6 | — | Downstream Front | OE Replacement |
| 2007 | BMW | 335i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2007 | BMW | 335i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2007 | BMW | 335i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2007 | BMW | 335xi | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Cil 1-3; Downstream; Walker Products Aftermarket |
| 2007 | BMW | 335xi | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3 on Bank 1 Sensor 2.; Walker Products Aftermarket |
| 2007 | BMW | 335xi | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3; B1S2; Downstream; Walker Products Aftermarket |
| 2007 | BMW | 550i | — | Manual | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2007 | BMW | 550i | — | Automatic | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2007 | BMW | 650Ci | — | — | 4.8L | V8 | — | Downstream Left | OE Replacement |
| 2007 | BMW | 650i | — | Manual | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2007 | BMW | 650i | — | Automatic | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2007 | BMW | 750i | — | — | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2007 | BMW | 750Li | — | — | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2007 | BMW | X3 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2007 | BMW | X3 | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2007 | BMW | X5 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2007 | BMW | X5 | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2007 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2007 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2006 | BMW | 130i | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2006 | BMW | 130i | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2006 | BMW | 325i | — | — | 3.0L | L6 | GAS | Downstream | Fits Cylinders 1-3 downstream up to November 2005.; Walker Products Aftermarket |
| 2006 | BMW | 325i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3, Downstream, From 11/2005; Cil 1-3, Downstream, De 11/2005; Walker Products Aftermarket |
| 2006 | BMW | 325i | — | — | 2.5L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2006 | BMW | 325i | — | — | 3.0L | L6 | GAS | Downstream | Cylinders 1-3 downstream oxygen sensor compatible for vehicles up to November 2005.; Walker Products Aftermarket |
| 2006 | BMW | 325i | — | — | 3.0L | L6 | GAS | Downstream | Downstream Oxygen Sensor fits Cylinders 1-3 manufactured from November 2005.; Walker Products Aftermarket |
| 2006 | BMW | 325i | — | — | 2.5L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
| 2006 | BMW | 325xi | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3, Downstream, From 11/2005; Cil 1-3, Downstream, De 11/2005; Walker Products Aftermarket |
| 2006 | BMW | 325xi | — | — | 3.0L | L6 | GAS | Downstream | Fits Cylinders 1-3 downstream up to November 2005.; Walker Products Aftermarket |
| 2006 | BMW | 325xi | — | — | 3.0L | L6 | GAS | Downstream | Downstream Oxygen Sensor fits Cylinders 1-3 manufactured from November 2005.; Walker Products Aftermarket |
| 2006 | BMW | 325xi | — | — | 3.0L | L6 | GAS | Downstream | Cylinders 1-3 downstream oxygen sensor compatible for vehicles up to November 2005.; Walker Products Aftermarket |
| 2006 | BMW | 330i | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3, Downstream, From 11/2005; Cil 1-3, Downstream, De 11/2005; Walker Products Aftermarket |
| 2006 | BMW | 330i | — | — | 3.0L | L6 | GAS | Downstream | Fits Cylinders 1-3 downstream up to November 2005.; Walker Products Aftermarket |
| 2006 | BMW | 330i | — | — | 3.0L | L6 | GAS | Downstream | Downstream Oxygen Sensor fits Cylinders 1-3 manufactured from November 2005.; Walker Products Aftermarket |
| 2006 | BMW | 330i | — | — | 3.0L | L6 | GAS | Downstream | Cylinders 1-3 downstream oxygen sensor compatible for vehicles up to November 2005.; Walker Products Aftermarket |
| 2006 | BMW | 330xi | — | — | 3.0L | L6 | GAS | Downstream | Fits Cylinders 1-3 downstream up to November 2005.; Walker Products Aftermarket |
| 2006 | BMW | 330xi | — | — | 3.0L | L6 | GAS | Downstream | Cyl 1-3, Downstream, From 11/2005; Cil 1-3, Downstream, De 11/2005; Walker Products Aftermarket |
| 2006 | BMW | 330xi | — | — | 3.0L | L6 | GAS | Downstream | Cylinders 1-3 downstream oxygen sensor compatible for vehicles up to November 2005.; Walker Products Aftermarket |
| 2006 | BMW | 330xi | — | — | 3.0L | L6 | GAS | Downstream | Downstream Oxygen Sensor fits Cylinders 1-3 manufactured from November 2005.; Walker Products Aftermarket |
| 2006 | BMW | 550i | — | Manual | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2006 | BMW | 550i | — | Automatic | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2006 | BMW | 650Ci | — | — | 4.8L | V8 | — | Downstream Left | OE Replacement |
| 2006 | BMW | 650i | — | Manual | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2006 | BMW | 650i | — | Automatic | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2006 | BMW | 750i | — | — | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2006 | BMW | 750Li | — | — | 4.8L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2006 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Downstream oxygen sensor for cylinders 1-3.; Walker Products Aftermarket |
| 2006 | BMW | Z4 | — | — | 3.0L | L6 | GAS | Downstream | Cylinder 1-3 Downstream Oxygen Sensor; Walker Products Aftermarket |
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