Walker 250-25146 oxygen sensor for the 2020-2026 Audi RS Q8 V8 4.0L and other vehicles measures the oxygen in the exhaust gas to show how efficiently the engine burns fuel. This Walker oxygen sensor is made for its specific application and mounting position, and it gives the ECU the diagnostic feedback the system needs.
- Reads oxygen levels so the air-fuel mixture can be fine-tuned, which supports fuel economy
- Electrodes coated with a gas-permeable platinum layer
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust
- Monitors exhaust gases to help reduce pollutants
Quick facts
- Part: Walker 250-25146 oxygen sensor
- Fits: 2020-2026 Audi RS Q8 V8 4.0L and other vehicles
- Position: Upstream right, upstream rear
- Condition: New
A poorly running engine, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light can mean the oxygen sensor is failing, though damage to the wiring harness or connector can be behind the same signs.
Fits
Among the vehicles it fits are the 2020-2026 Audi RS Q8 V8 4.0L, the 2020-2026 Audi SQ7 V8 4.0L and the 2020-2026 Audi SQ8 V8 4.0L. For any other car, find your year, model and engine in the "Vehicles it fits" section. This listing is one sensor, and the fitment lists one for this position; sensors in other positions are separate parts.
Specifications
Fit and size
- Position: upstream right, upstream rear
- Quantity per vehicle: 1
- Thread: M18 - 1.5, threaded
Build and materials
- Type: wide-band
- Electrode coating: gas-permeable platinum layer
- Condition: new
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is the Walker 250-25146 oxygen sensor right for the 2020-2026 Audi RS Q8 V8 4.0L?
Yes. Walker 250-25146 fits the 2020-2026 Audi RS Q8 V8 4.0L, in the upstream right, upstream rear position, and the fitment lists one sensor for that position.
Is the Walker Products oxygen sensor 250-25146 a wide-band sensor?
Yes. Walker 250-25146 is a wide-band oxygen sensor with an M18 - 1.5 thread.
Which position does this Walker O2 sensor go in?
This oxygen sensor is for the upstream right, upstream rear position. Sensors in other positions are separate parts.
What does the platinum layer on this oxygen sensor's electrodes do?
The electrodes are coated with a gas-permeable platinum layer. The coating protects their surfaces from contamination and erosion by combustion residue and particulates in the exhaust.
Will a failed oxygen sensor store a fault code?
On newer vehicles it can. The ECU stores fault codes, and some relate to the affected sensor and its systems; a shop can read them.
