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Walker 350-34254 Oxygen Sensor - Downstream Left or Downstream Right
| Brand | Walker 350-34254 |
|---|---|
| Position | Downstream Left |
| Connector Gender | Female |
| Connector Shape | Radiused Polygon |
| Mounting Type | Threaded |
| Overall Length | 16.85 |
| Sensor Type | Heated |
| Thread Diameter | 18.0 |
| Universal Or Specific Fit | Specific |
| Wire Gauge Measurement | 20 |
| Wire Quantity | 4 |
| Wiring Harness Length | 13.31 |
| Product line | Walker Products Aftermarket |
| Fits | Ford · 20 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.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Walker 350-34254 Oxygen Sensor Overview
Walker Products 350-34254 is a heated oxygen sensor built as a specific-fit OE replacement for select Ford and Lincoln applications. It is engineered to provide the ECU with the correct exhaust feedback for downstream monitoring, helping maintain proper fuel control and emissions performance.
Key Features
- Heated oxygen sensor for faster operating temperature and signal response
- Specific-fit design for the listed downstream positions
- 4-wire configuration with a 20-gauge harness
- Radiused polygon female connector for application-specific connection
- Threaded mounting with 18.0 mm thread diameter
- Wiring harness length: 13.31 in.; overall length: 16.85 in.
Fitment and Application
Compatible with 2011-2014 Ford F-150, downstream right and downstream left. Compatible with 2011-2014 Lincoln Mark LT, downstream right. This Walker Products Aftermarket oxygen sensor, part number 350-34254, is built for the listed vehicle positions and is intended to deliver the diagnostic feedback required by the engine control unit.
What It Helps Address
- Check engine light related to downstream oxygen sensor faults
- Rough engine operation caused by incorrect exhaust feedback
- Increased fuel consumption from inaccurate air-fuel correction
- Higher exhaust emissions from a failing sensor signal
- Stored ECU fault codes tied to the affected sensor circuit
Installation Notes
Verify the downstream left or downstream right position before ordering. Inspect the sensor, wiring harness, and connector for physical damage before installation, since damaged wiring can shorten service life and affect signal quality. Confirm thread size, connector shape, and harness length against the original part on the vehicle.
Quality Assurance
Walker Products has supplied engine management and oxygen/air-fuel sensors since 1946 and manufactures this part as an OE-style replacement for the specified application. The company is ISO 9001/TS 16949 certified, supporting consistent production and application-specific fitment.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2014 | Ford | F-150 | 6.2L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | Ford | F-150 | 6.2L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | Ford | F-150 | 5.0L | V8 | FLEX | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2014 | Ford | F-150 | 5.0L | V8 | FLEX | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2014 | Lincoln | Mark LT | 5.0L | V8 | — | Downstream Right | OE Replacement |
| 2013 | Ford | F-150 | 6.2L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | Ford | F-150 | 6.2L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | Ford | F-150 | 5.0L | V8 | FLEX | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2013 | Ford | F-150 | 5.0L | V8 | FLEX | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2013 | Lincoln | Mark LT | 5.0L | V8 | — | Downstream Right | OE Replacement |
| 2012 | Ford | F-150 | 6.2L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2012 | Ford | F-150 | 6.2L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | Ford | F-150 | 5.0L | V8 | FLEX | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2012 | Ford | F-150 | 5.0L | V8 | FLEX | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2012 | Lincoln | Mark LT | 5.0L | V8 | — | Downstream Right | OE Replacement |
| 2011 | Ford | F-150 | 6.2L | V8 | GAS | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2011 | Ford | F-150 | 6.2L | V8 | GAS | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2011 | Ford | F-150 | 5.0L | V8 | FLEX | Downstream Right | Install downstream oxygen sensor on the right side.; Walker Products Aftermarket |
| 2011 | Ford | F-150 | 5.0L | V8 | FLEX | Downstream Left | Downstream left oxygen sensor required.; Walker Products Aftermarket |
| 2011 | Lincoln | Mark LT | 5.0L | V8 | — | Downstream Right | OE Replacement |
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