Walker Products 350-35139 oxygen sensor for the 2021-2026 Audi RS6 Avant V8 4.0L and other vehicles measures the oxygen in the exhaust gas to show how efficiently the engine is burning fuel. It is a wide-band sensor for the upstream left, upstream front position.
- Electrodes made of a gas-permeable platinum layer
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust
- Reads the oxygen content of the exhaust gas to monitor the air-fuel ratio
- Made for its specific application, with the diagnostic feedback the ECU requires
- Oxygen readings help fine-tune the air-fuel mixture for fuel economy
Quick facts
- Part: Walker Products 350-35139 oxygen sensor
- Fits: 2021-2026 Audi RS6 Avant V8 4.0L and other vehicles
- Position: Upstream left, upstream front
- Condition: New
A failing sensor can make the engine run poorly, raise fuel consumption or exhaust emissions, or turn on the malfunction indicator light. Those symptoms have other possible sources, so with the engine off and cool, look over the sensor, its wiring harness and the connector for physical damage before you replace it.
Fits
The 2021-2026 Audi RS6 Avant V8 4.0L, the 2021-2026 Audi RS7 Sportback V8 4.0L and the 2021-2023 Volkswagen Teramont V6 3.6L are covered, along with many other vehicles. This listing is one sensor, and the fitment calls for one per vehicle. If your car is not named here, look up its year and engine in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: upstream left, upstream front
- Quantity per vehicle: 1
- Thread size: M18 - 1.5
Build and materials
- Type: wide-band
- Electrodes: gas-permeable platinum layer
- Condition: new
Frequently Asked Questions
Does the Walker Products 350-35139 oxygen sensor fit the 2021-2026 Audi RS7 Sportback V8 4.0L?
Yes. Walker Products 350-35139 is listed for the 2021-2026 Audi RS7 Sportback V8 4.0L, and the fitment calls for one sensor per vehicle.
Is this oxygen sensor right for the 2021-2023 Volkswagen Teramont V6 3.6L?
Yes. This oxygen sensor is listed for the 2021-2023 Volkswagen Teramont V6 3.6L in the upstream left, upstream front position.
What thread size does the Walker Products 350-35139 sensor have?
The thread size is M18 - 1.5. Walker Products 350-35139 is a wide-band sensor.
What can a failing wide-band oxygen sensor cause?
A failed sensor can make the engine run poorly, raise fuel consumption or exhaust emissions, or turn on the malfunction indicator light. Newer vehicles also store fault codes in the ECU, some tied to the sensor.
What does the coating on this oxygen sensor's electrodes do?
The electrodes are a gas-permeable platinum layer. The coating protects their surfaces from contamination and erosion by combustion residue and particulates in the exhaust gases.
