Walker Products 250-24994 right oxygen sensor for the 2021-2025 Audi A4 Allroad 4-cylinder 2.0L and other vehicles measures the oxygen in the exhaust gas to show combustion efficiency. This Walker Products oxygen sensor is a 4-wire, narrow-band direct fit unit for the downstream right position.
- Electrodes made of a gas-permeable platinum layer
- Coating that protects the electrode surfaces from contamination and erosion by combustion residue and particulates
- Oxygen readings that help fine-tune the air-fuel mixture and support fuel economy
- Exhaust gas monitoring that helps reduce pollutants
- Made for its specific application and fitment position, with the diagnostic feedback the ECU needs
Quick facts
- Part: Walker Products 250-24994 oxygen sensor
- Fits: 2021-2025 Audi A4 Allroad 4-cylinder 2.0L and other vehicles
- Position: Downstream right
- Condition: New
A failing sensor can make the engine run poorly, raise fuel use or exhaust emissions, or turn on the malfunction indicator light. Other faults can produce these symptoms too, so track down the cause before replacing the sensor. With the engine off and cool, look over the sensor, its wiring harness and the connector for physical damage. This listing is one sensor for the downstream right position; each other position takes its own sensor, ordered separately.
Fits
The 2021-2025 Audi A4 Allroad 4-cylinder 2.0L, the 2021-2025 Audi A4 Quattro 4-cylinder 2.0L and the 2021-2025 Audi A5 Sportback 4-cylinder 2.0L all fit this sensor, along with many other vehicles. If your car is not named here, you can look up its year and engine in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: downstream right
- Quantity per application: 1
- Number of wires: 4
Build and materials
- Sensor type: narrow-band
- Fit type: direct fit
- Electrodes: gas-permeable platinum layer
- Condition: new
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is this the right oxygen sensor for a 2021-2025 Audi A4 Quattro 4-cylinder 2.0L?
Yes. Walker Products 250-24994 fits the 2021-2025 Audi A4 Quattro 4-cylinder 2.0L as the downstream right sensor. Owners of other cars can check their year and engine in the "Vehicles it fits" section.
Is part 250-24994 a narrow-band or wideband oxygen sensor?
Narrow-band. Walker Products 250-24994 is a 4-wire narrow-band direct fit sensor with electrodes made of a gas-permeable platinum layer.
What does the coating on this oxygen sensor protect against?
The coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gases.
Is this oxygen sensor for the upstream or downstream position?
Downstream, on the right side. The other positions on the car are separate sensors.
Does this oxygen sensor send feedback to the engine computer?
Yes. The sensor is made for its specific application and fitment position, and it provides the diagnostic feedback the ECU needs.
