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Walker Products AftermarketWalker 350-34142 Oxygen Sensor
| Brand | Walker 350-34142 |
|---|---|
| Position | Downstream Left |
| Connector Gender | Male |
| Connector Shape | Radiused Polygon |
| Mounting Type | Threaded |
| Overall Length | 14.88 |
| Sensor Type | Heated |
| Thread Diameter | 18.0 |
| Universal Or Specific Fit | Specific |
| Wire Gauge Measurement | 20 |
| Wire Quantity | 4 |
| Wiring Harness Length | 11.34 |
| Product line | Walker Products Aftermarket |
| Fits | BMW and Land Rover · 299 vehicles |
OE replacement. Engineered for specific application fit and ECU feedback.
Heated sensor. Helps deliver faster, more consistent readings.
Threaded mount. Installs with a secure, direct-fit connection.
$58.25Free shipping
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Walker 350-34142 Oxygen Sensor for BMW and Land Rover
Walker Products 350-34142 is a heated oxygen sensor built as a direct-fit replacement for specific BMW and Land Rover applications. It is engineered for the correct mounting position and ECU feedback, helping restore accurate exhaust monitoring on vehicles such as the BMW X5, BMW 330i, and Land Rover Range Rover.
Key Features
- Heated oxygen sensor with 4-wire design
- Specific-fit application for the listed BMW and Land Rover models
- Threaded mounting type with 18.0 mm thread diameter
- Radiused polygon male connector for proper vehicle-side connection
- Wiring harness length: 11.34; overall length: 14.88
- Walker Products Aftermarket line for engine management and emissions service
Product Details
Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed as OE-style replacements for worldwide vehicle coverage. Part number 350-34142 is built for the specified upstream and downstream positions listed below, including BMW applications that use bank- and cylinder-specific sensor locations. For fitment-based searches, this oxygen sensor is a direct replacement for BMW X3 upstream, BMW X5 upstream, BMW Z4 upstream, BMW 325i upstream, BMW 330i upstream, and Land Rover Range Rover upstream right or left positions.
This part cross-references no listed aftermarket part numbers in the provided data.
What It Helps Address
- Check engine light or malfunction indicator light related to oxygen sensor faults
- Poor fuel economy caused by inaccurate exhaust oxygen readings
- Rough engine operation from incorrect air-fuel feedback to the ECU
- Higher exhaust emissions from a failing upstream or downstream sensor
- Fault codes stored in the ECU for the affected sensor circuit
Installation Notes and Fitment
Fits 2014-2016 BMW X6, downstream right. Fits 2014-2016 BMW X6, downstream left. Fits 2004-2006 BMW X3, upstream. Fits 2001-2006 BMW X5, upstream. Fits 2003-2006 BMW Z4, upstream. Fits 2001-2005 BMW 320i, upstream. Fits 2001-2005 BMW 325xi, upstream. Fits 2001-2005 BMW 330xi, upstream. Fits 2003-2005 Land Rover Range Rover, upstream right. Fits 2003-2005 Land Rover Range Rover, upstream left.
Before installation, inspect the sensor wiring harness and connector for damage, and confirm the correct bank, cylinder group, and sensor position for the vehicle. Threaded mounting and the specified connector style should be matched to the original location for proper ECU feedback.
Quality Assurance
Walker Products has manufactured engine management components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The 350-34142 oxygen sensor is produced for the specified application and fitment position to support accurate diagnostic system response.
This part fits 299 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
| Year | Make | Model | Submodel | Body Type | Transmission | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| 2016 | BMW | X6 | — | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2016 | BMW | X6 | — | — | — | 4.4L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2015 | BMW | X6 | — | — | — | 4.4L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2015 | BMW | X6 | — | — | — | 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 |
| 2006 | BMW | X3 | — | — | Manual | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2006 | BMW | X3 | — | — | Manual | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2006 | BMW | X3 | 2.5i | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2006 | BMW | X3 | 2.5i | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2006 | BMW | X5 | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2006 | BMW | X5 | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2006 | BMW | Z4 | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2006 | BMW | Z4 | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2006 | BMW | Z4 | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2006 | BMW | Z4 | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2005 | BMW | 320i | — | — | — | 2.2L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2005 | BMW | 320i | — | — | — | 2.2L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2005 | BMW | 325xi | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2005 | BMW | 325xi | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2005 | BMW | 330xi | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2005 | BMW | 330xi | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2005 | BMW | X3 | — | — | Manual | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2005 | BMW | X3 | — | — | Manual | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2005 | BMW | X3 | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2005 | BMW | X3 | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2005 | BMW | X5 | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2005 | BMW | X5 | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2005 | BMW | Z4 | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2005 | BMW | Z4 | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2005 | BMW | Z4 | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2005 | BMW | Z4 | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2005 | Land Rover | Range Rover | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2005 | Land Rover | Range Rover | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2004 | BMW | 320i | — | — | — | 2.2L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2004 | BMW | 320i | — | — | — | 2.2L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2004 | BMW | 325xi | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2004 | BMW | 325xi | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2004 | BMW | 330xi | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2004 | BMW | 330xi | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2004 | BMW | X3 | — | — | Manual | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2004 | BMW | X3 | — | — | Manual | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2004 | BMW | X3 | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2004 | BMW | X3 | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2004 | BMW | X5 | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2004 | BMW | X5 | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2004 | BMW | Z4 | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2004 | BMW | Z4 | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2004 | BMW | Z4 | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2004 | BMW | Z4 | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2004 | Land Rover | Range Rover | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2004 | Land Rover | Range Rover | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2003 | BMW | 320i | — | — | — | 2.2L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2003 | BMW | 320i | — | — | — | 2.2L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2003 | BMW | 325Ci | — | — | — | 2.5L | L6 | GAS | Upstream | Cyl 4-6, To 03/2003; Cil 4-6, al 03/2003; Upstream; Cyl 4-6; Walker Products Aftermarket |
| 2003 | BMW | 325Ci | — | — | — | 2.5L | L6 | GAS | Upstream | Cyl 1-3, To 03/2003; Cil 1-3, al 03/2003; Upstream; Cyl 1-3; Walker Products Aftermarket |
| 2003 | BMW | 325Ci | — | — | — | 2.5L | L6 | GAS | Upstream | Cyl 4-6, To 03/2003; Upstream; Cyl 4-6; Walker Products Aftermarket |
| 2003 | BMW | 325Ci | — | — | — | 2.5L | L6 | GAS | Upstream | Cyl 1-3, To 03/2003; Upstream; Cyl 1-3; Walker Products Aftermarket |
| 2003 | BMW | 325i | — | — | — | 2.5L | L6 | GAS | Upstream | Cyl 4-6, To 03/03; Cil 4-6, al 03/03; Upstream; Cyl 4-6; Walker Products Aftermarket |
| 2003 | BMW | 325i | — | — | — | 2.5L | L6 | GAS | Upstream | Cyl 1-3, To 03/03; Cil 1-3, al 03/03; Upstream; Cyl 1-3; Walker Products Aftermarket |
| 2003 | BMW | 325i | — | — | — | 2.5L | L6 | GAS | Upstream | Cyl 4-6, To 03/03; Upstream; Cyl 4-6; Walker Products Aftermarket |
| 2003 | BMW | 325i | — | — | — | 2.5L | L6 | GAS | Upstream | Cyl 1-3, To 03/03; Upstream; Cyl 1-3; Walker Products Aftermarket |
| 2003 | BMW | 325xi | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2003 | BMW | 325xi | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2003 | BMW | 330Ci | — | — | — | 3.0L | L6 | GAS | Upstream | Cyl 1-3, To 03/03; Cil 1-3, al 03/03; Upstream; Cyl 1-3; Walker Products Aftermarket |
| 2003 | BMW | 330Ci | — | — | — | 3.0L | L6 | GAS | Upstream | Cyl 4-6, To 03/03; Cil 4-6, al 03/03; Upstream; Cyl 4-6; Walker Products Aftermarket |
| 2003 | BMW | 330Ci | — | — | — | 3.0L | L6 | GAS | Upstream | Cyl 1-3, To 03/03; Upstream; Cyl 1-3; Walker Products Aftermarket |
| 2003 | BMW | 330Ci | — | — | — | 3.0L | L6 | GAS | Upstream | Cyl 4-6, To 03/03; Upstream; Cyl 4-6; Walker Products Aftermarket |
| 2003 | BMW | 330i | — | — | — | 3.0L | L6 | GAS | Upstream | Cyl 1-3, To 03/03; Cil 1-3, al 03/03; Upstream; Cyl 1-3; Walker Products Aftermarket |
| 2003 | BMW | 330i | — | — | — | 3.0L | L6 | GAS | Upstream | Cyl 4-6, To 03/03; Cil 4-6, al 03/03; Upstream; Cyl 4-6; Walker Products Aftermarket |
| 2003 | BMW | 330i | — | — | — | 3.0L | L6 | GAS | Upstream | Cyl 1-3, To 03/03; Upstream; Cyl 1-3; Walker Products Aftermarket |
| 2003 | BMW | 330i | — | — | — | 3.0L | L6 | GAS | Upstream | Cyl 4-6, To 03/03; Upstream; Cyl 4-6; Walker Products Aftermarket |
| 2003 | BMW | 330xi | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2003 | BMW | 330xi | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2003 | BMW | 525i | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2003 | BMW | 525i | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2003 | BMW | 530i | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2003 | BMW | 530i | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2003 | BMW | 540i | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2003 | BMW | 540i | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2003 | BMW | M5 | — | — | — | 5.0L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2003 | BMW | M5 | — | — | — | 5.0L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2003 | BMW | X5 | — | — | — | 4.6L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2003 | BMW | X5 | — | — | — | 4.6L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2003 | BMW | X5 | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2003 | BMW | X5 | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2003 | BMW | X5 | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2003 | BMW | X5 | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2003 | BMW | Z4 | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2003 | BMW | Z4 | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2003 | BMW | Z4 | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2003 | BMW | Z4 | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2003 | BMW | Z8 | — | — | — | 5.0L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2003 | BMW | Z8 | — | — | — | 5.0L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2003 | BMW | Z8 | — | — | — | 4.8L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2003 | BMW | Z8 | — | — | — | 4.8L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2003 | Land Rover | Range Rover | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2003 | Land Rover | Range Rover | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2002 | BMW | 320i | — | — | — | 2.2L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2002 | BMW | 320i | — | — | — | 2.2L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2002 | BMW | 325Ci | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2002 | BMW | 325Ci | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2002 | BMW | 325i | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2002 | BMW | 325i | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2002 | BMW | 325xi | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2002 | BMW | 325xi | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2002 | BMW | 330Ci | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2002 | BMW | 330Ci | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2002 | BMW | 330i | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2002 | BMW | 330i | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2002 | BMW | 330xi | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2002 | BMW | 330xi | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2002 | BMW | 525i | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2002 | BMW | 525i | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2002 | BMW | 530i | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2002 | BMW | 530i | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2002 | BMW | 540i | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2002 | BMW | 540i | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2002 | BMW | M5 | — | — | — | 5.0L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2002 | BMW | M5 | — | — | — | 5.0L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2002 | BMW | X5 | — | — | — | 4.6L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2002 | BMW | X5 | — | — | — | 4.6L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2002 | BMW | X5 | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2002 | BMW | X5 | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2002 | BMW | X5 | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2002 | BMW | X5 | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2002 | BMW | Z3 | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2002 | BMW | Z3 | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2002 | BMW | Z3 | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2002 | BMW | Z3 | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2002 | BMW | Z3 | — | — | — | 2.2L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2002 | BMW | Z3 | — | — | — | 2.2L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2002 | BMW | Z8 | — | — | — | 5.0L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2002 | BMW | Z8 | — | — | — | 5.0L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2001 | BMW | 320i | — | — | — | 2.2L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2001 | BMW | 320i | — | — | — | 2.2L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2001 | BMW | 323i | — | — | — | 2.5L | L6 | GAS | Upstream Right | Cyl 4-6; Cil 4-6; Upstream; Right; Walker Products Aftermarket |
| 2001 | BMW | 323i | — | — | — | 2.5L | L6 | GAS | Upstream Left | Cyl 1-3; Cil 1-3; Upstream; Left; Walker Products Aftermarket |
| 2001 | BMW | 323i | — | — | — | 2.5L | L6 | GAS | Upstream Right | Cyl 4-6; Upstream; Right; Walker Products Aftermarket |
| 2001 | BMW | 323i | — | — | — | 2.5L | L6 | GAS | Upstream Left | Cyl 1-3; Upstream; Left; Walker Products Aftermarket |
| 2001 | BMW | 325Ci | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2001 | BMW | 325Ci | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2001 | BMW | 325i | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2001 | BMW | 325i | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2001 | BMW | 325xi | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2001 | BMW | 325xi | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2001 | BMW | 330Ci | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2001 | BMW | 330Ci | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2001 | BMW | 330i | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2001 | BMW | 330i | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2001 | BMW | 330xi | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2001 | BMW | 330xi | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2001 | BMW | 525i | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2001 | BMW | 525i | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2001 | BMW | 530i | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2001 | BMW | 530i | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2001 | BMW | 540i | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2001 | BMW | 540i | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2001 | BMW | 740i | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2001 | BMW | 740i | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2001 | BMW | 740iL | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2001 | BMW | 740iL | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2001 | BMW | 750iL | — | — | — | 5.4L | V12 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2001 | BMW | 750iL | — | — | — | 5.4L | V12 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2001 | BMW | M5 | — | — | — | 5.0L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2001 | BMW | M5 | — | — | — | 5.0L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2001 | BMW | X5 | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2001 | BMW | X5 | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2001 | BMW | X5 | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2001 | BMW | X5 | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2001 | BMW | Z3 | — | — | — | 3.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2001 | BMW | Z3 | — | — | — | 3.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2001 | BMW | Z3 | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2001 | BMW | Z3 | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2001 | BMW | Z3 | — | — | — | 2.2L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2001 | BMW | Z3 | — | — | — | 2.2L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2001 | BMW | Z8 | — | — | — | 5.0L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2001 | BMW | Z8 | — | — | — | 5.0L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2000 | BMW | 323Ci | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2000 | BMW | 323Ci | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2000 | BMW | 323i | — | — | — | 2.5L | L6 | GAS | Upstream Right | Cyl 4-6; Cil 4-6; Upstream; Right; Walker Products Aftermarket |
| 2000 | BMW | 323i | — | — | — | 2.5L | L6 | GAS | Upstream Left | Cyl 1-3; Cil 1-3; Upstream; Left; Walker Products Aftermarket |
| 2000 | BMW | 323i | — | — | — | 2.5L | L6 | GAS | Upstream Right | Cyl 4-6; Upstream; Right; Walker Products Aftermarket |
| 2000 | BMW | 323i | — | — | — | 2.5L | L6 | GAS | Upstream Left | Cyl 1-3; Upstream; Left; Walker Products Aftermarket |
| 2000 | BMW | 328Ci | — | — | — | 2.8L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2000 | BMW | 328Ci | — | — | — | 2.8L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2000 | BMW | 328i | — | — | — | 2.8L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2000 | BMW | 328i | — | — | — | 2.8L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2000 | BMW | 528i | — | — | — | 2.8L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2000 | BMW | 528i | — | — | — | 2.8L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2000 | BMW | 540i | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2000 | BMW | 540i | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2000 | BMW | 740i | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2000 | BMW | 740i | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2000 | BMW | 740iL | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2000 | BMW | 740iL | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2000 | BMW | 750iL | — | — | — | 5.4L | V12 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2000 | BMW | 750iL | — | — | — | 5.4L | V12 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2000 | BMW | M5 | — | — | — | 5.0L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2000 | BMW | M5 | — | — | — | 5.0L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2000 | BMW | X5 | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2000 | BMW | X5 | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 2000 | BMW | Z3 | — | — | — | 2.8L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2000 | BMW | Z3 | — | — | — | 2.8L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2000 | BMW | Z3 | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2000 | BMW | Z3 | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2000 | BMW | Z3 | — | — | — | 2.0L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 2000 | BMW | Z3 | — | — | — | 2.0L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 2000 | BMW | Z8 | — | — | — | 5.0L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2000 | BMW | Z8 | — | — | — | 5.0L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1999 | BMW | 318i | Base | — | — | 1.9L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1999 | BMW | 318i | Base | — | — | 1.9L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 1999 | BMW | 318is | Base | — | — | 1.9L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1999 | BMW | 318is | Base | — | — | 1.9L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 1999 | BMW | 318ti | — | — | — | 1.9L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1999 | BMW | 318ti | — | — | — | 1.9L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 1999 | BMW | 323i | — | Sedan | — | 2.5L | L6 | GAS | Upstream Right | Cyl 4-6; Cil 4-6; Upstream; Right; Walker Products Aftermarket |
| 1999 | BMW | 323i | — | Sedan | — | 2.5L | L6 | GAS | Upstream Left | Cyl 1-3; Cil 1-3; Upstream; Left; Walker Products Aftermarket |
| 1999 | BMW | 323i | — | Sedan | — | 2.5L | L6 | GAS | Upstream Right | Cyl 4-6; Upstream; Right; Walker Products Aftermarket |
| 1999 | BMW | 323i | — | Sedan | — | 2.5L | L6 | GAS | Upstream Left | Cyl 1-3; Upstream; Left; Walker Products Aftermarket |
| 1999 | BMW | 328i | — | — | — | 2.8L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 1999 | BMW | 328i | — | — | — | 2.8L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 1999 | BMW | 528i | — | — | — | 2.8L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 1999 | BMW | 528i | — | — | — | 2.8L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 1999 | BMW | 540i | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1999 | BMW | 540i | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1999 | BMW | 740i | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1999 | BMW | 740i | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1999 | BMW | 740iL | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1999 | BMW | 740iL | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1999 | BMW | 750iL | — | — | — | 5.4L | V12 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1999 | BMW | 750iL | — | — | — | 5.4L | V12 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1999 | BMW | 850Ci | — | — | — | 5.4L | V12 | — | Downstream Left | OE Replacement |
| 1999 | BMW | M5 | — | — | — | 4.9L | V8 | — | Upstream Right | OE Replacement |
| 1999 | BMW | Z3 | — | — | — | 2.8L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 1999 | BMW | Z3 | — | — | — | 2.8L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 1999 | BMW | Z3 | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 1999 | BMW | Z3 | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 1998 | BMW | 318i | — | — | — | 1.9L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1998 | BMW | 318i | — | — | — | 1.9L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 1998 | BMW | 318is | Base | — | — | 1.9L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1998 | BMW | 318is | Base | — | — | 1.9L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 1998 | BMW | 318ti | — | — | — | 1.9L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1998 | BMW | 318ti | — | — | — | 1.9L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 1998 | BMW | 540i | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1998 | BMW | 540i | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1998 | BMW | 740i | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1998 | BMW | 740i | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1998 | BMW | 740iL | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1998 | BMW | 740iL | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1998 | BMW | 750iL | — | — | — | 5.4L | V12 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1998 | BMW | 750iL | — | — | — | 5.4L | V12 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1998 | BMW | 850Ci | — | — | — | 5.4L | V12 | — | Downstream Left | OE Replacement |
| 1998 | BMW | Z3 | — | — | — | 1.9L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1998 | BMW | Z3 | — | — | — | 1.9L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 1997 | BMW | 318i | — | — | — | 1.9L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1997 | BMW | 318i | — | — | — | 1.9L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 1997 | BMW | 318is | — | — | — | 1.9L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1997 | BMW | 318is | — | — | — | 1.9L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 1997 | BMW | 318ti | — | — | — | 1.9L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1997 | BMW | 318ti | — | — | — | 1.9L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 1997 | BMW | 325i | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 1997 | BMW | 325i | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 1997 | BMW | 540i | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1997 | BMW | 540i | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1997 | BMW | 740i | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1997 | BMW | 740i | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1997 | BMW | 740iL | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1997 | BMW | 740iL | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1997 | BMW | 750iL | — | — | — | 5.4L | V12 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1997 | BMW | 750iL | — | — | — | 5.4L | V12 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1997 | BMW | 840Ci | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1997 | BMW | 840Ci | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1997 | BMW | 850Ci | — | — | — | 5.4L | V12 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1997 | BMW | 850Ci | — | — | — | 5.4L | V12 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1997 | BMW | Z3 | — | — | — | 1.9L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1997 | BMW | Z3 | — | — | — | 1.9L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 1996 | BMW | 318i | — | — | — | 1.9L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1996 | BMW | 318i | — | — | — | 1.9L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 1996 | BMW | 318is | — | — | — | 1.9L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1996 | BMW | 318is | — | — | — | 1.9L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 1996 | BMW | 318ti | — | — | — | 1.9L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1996 | BMW | 318ti | — | — | — | 1.9L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 1996 | BMW | 325i | — | — | — | 2.5L | L6 | GAS | Upstream | Oxygen sensor fits cylinders 1-3 for upstream installation.; Walker Products Aftermarket |
| 1996 | BMW | 325i | — | — | — | 2.5L | L6 | GAS | Upstream | Upstream oxygen sensor for cylinders 4-6.; Walker Products Aftermarket |
| 1996 | BMW | 740iL | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1996 | BMW | 740iL | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1996 | BMW | 750iL | — | — | — | 5.4L | V12 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1996 | BMW | 750iL | — | — | — | 5.4L | V12 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1996 | BMW | 840Ci | — | — | — | 4.4L | V8 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1996 | BMW | 840Ci | — | — | — | 4.4L | V8 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1996 | BMW | 850Ci | — | — | — | 5.4L | V12 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1996 | BMW | 850Ci | — | — | — | 5.4L | V12 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1996 | BMW | Z3 | — | — | — | 1.9L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 1996 | BMW | Z3 | — | — | — | 1.9L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 1995 | BMW | 750iL | — | — | — | 5.4L | V12 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1995 | BMW | 750iL | — | — | — | 5.4L | V12 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| 1995 | BMW | 850Ci | — | — | — | 5.4L | V12 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 1995 | BMW | 850Ci | — | — | — | 5.4L | V12 | GAS | Upstream Left | Install upstream oxygen sensor on the left side.; Walker Products Aftermarket |
| No rows match your filter. | ||||||||||