Walker Oxygen Sensor - 350-34157
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Product Information
Full details
The Walker 350-34157 Oxygen Sensor is designed for automotive technicians and DIY enthusiasts seeking a reliable replacement for faulty exhaust monitoring components. This sensor offers the critical benefit of restoring precise fuel-to-air ratio management for improved engine efficiency and reduced emissions; however, users should verify their specific vehicle's OEM compatibility prior to purchase, as oxygen sensors are highly application-specific.
All features
| Model Part Number | 350-34157 |
|---|---|
| Brand | Walker |
Extended Product Information
FAQs
Does this sensor come with anti-seize compound already applied?
Please inspect the threads upon arrival. If the threads appear clean, applying a light coat of high-temperature anti-seize to the threads only is recommended.
Is this a direct fit for my Mini?
This sensor is compatible with OEM part 11 78 7 548 961. Always cross-reference your specific vehicle's engine code or VIN to ensure compatibility.
What does the 4-circuit configuration mean?
It refers to the wiring harness containing four distinct wires, typically including two for the heater circuit and two for the signal output.
Can I use this for both upstream and downstream positions?
This sensor is designed to meet specific OEM requirements for designated positions. Consult your vehicle's service manual to confirm if this part number is specified for the upstream or downstream location.
How long should a Walker Oxygen Sensor last?
While lifespan varies based on driving conditions and engine health, oxygen sensors are typically considered maintenance items and should be inspected periodically after 60,000 to 100,000 miles.
Troubleshooting
Check Engine Light remains on after installation
Use an OBD-II scanner to clear existing fault codes. Some vehicles require a 'drive cycle' for the ECU to calibrate with the new sensor readings.
Difficult to remove old sensor
Apply a penetrating oil to the threads and allow it to soak for 15 minutes. Using a warm engine can sometimes help loosen stubborn sensors, but use caution to avoid heat injury.
Pros and Cons
Pros
- Meets or exceeds original equipment specifications
- Precise 650 mm harness length for easy installation
- Restores efficient fuel mapping and engine performance
- Reliable 4-circuit electrical configuration
Cons
- Specific to certain European makes (Citroën, Peugeot, Mini)
- Requires proper tools for removal of old sensor
- Vehicle ECU may require a drive cycle to recognize new sensor
Setup, Compatibility & Care
Before installation, ensure the engine is cool to prevent burns. Use an oxygen sensor socket to carefully remove the old unit, being cautious not to damage the wiring harness. When installing the Walker 350-34157, verify that the threads are clean; if the sensor does not include pre-applied anti-seize, a tiny amount of high-temperature anti-seize compound may be applied to the threads only, ensuring none touches the sensor tip.
Compatibility
- Citroën/Peugeot: Replaces OEM number 1618V3.
- Mini: Replaces OEM number 11 78 7 548 961.
Care
Keep the sensor tip free of oil, coolant, and cleaning solvents, as these substances can contaminate the sensing element and lead to premature failure. Check the wiring harness connection annually for signs of corrosion.