Walker Products 350-34499 right oxygen sensor for the 2021-2025 Audi A4 Allroad 4-cylinder 2.0L and other vehicles measures the oxygen content of the exhaust gas. This Walker Products oxygen sensor is a four-wire, narrow-band unit that gives the ECU the combustion feedback it needs for its position.
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gas
- Measures oxygen levels to help fine-tune the air-fuel mixture and support fuel economy
- Electrodes with a gas-permeable platinum layer
- Monitors exhaust gases to help reduce pollutants
- Determines the oxygen content of the exhaust gas to track the air-fuel ratio and combustion efficiency
Quick facts
- Part: Walker Products 350-34499 oxygen sensor
- Fits: 2021-2025 Audi A4 Allroad 4-cylinder 2.0L and other vehicles
- Position: Downstream, downstream right
- Condition: New
A worn sensor can show up as rough running, higher fuel consumption or a lit malfunction indicator light, but a damaged wiring harness or connector may be behind any of those, so look both over for physical damage before you replace the sensor.
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 are among the cars this oxygen sensor fits. Driving something else? Find your own car in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: Downstream, downstream right
- Quantity per vehicle: 1
- Thread size: M18 - 1.5
Build and materials
- Type: Narrow-band
- Number of wires: 4
- Design: Direct fit
- Condition: New
In the box
One oxygen sensor. This listing is a single sensor for the downstream right position, which takes one; the car's other oxygen sensor positions are separate parts.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is this the Audi A4 Quattro oxygen sensor for 2021-2025 cars with the 4-cylinder 2.0L?
Yes. Walker Products 350-34499 fits the 2021-2025 Audi A4 Quattro 4-cylinder 2.0L. For any other car, look it up in the "Vehicles it fits" section.
Is this a narrow-band or a wideband oxygen sensor?
Narrow-band. Walker Products 350-34499 is a four-wire narrow-band oxygen sensor listed for the downstream and downstream right positions.
What thread size does the Walker Products 350-34499 have?
Walker Products 350-34499 has an M18 - 1.5 thread. It is a direct-fit sensor with four wires.
Is the 350-34499 sold as one sensor or a pair?
This listing is one oxygen sensor for the downstream right position. Other oxygen sensor positions on the car are separate parts.
What protects the electrodes in this oxygen sensor from exhaust deposits?
A coating on the electrode surfaces guards against contamination and erosion from combustion residue and particulates. The electrodes are made with a gas-permeable platinum layer.
