Oxygen Sensor for 2019-2020 Audi A4 & More - Walker 250-241273

Walker 250-241273 sensor for the 2019-2020 Audi A4 2.0L and other vehicles measures combustion efficiency from the amount of oxygen in the exhaust gas. This downstream Walker oxygen sensor is a direct-fit, narrow-band unit.

• Made for the specific application and fitting position, so it gives the ECU the diagnostic feedback it expects.
• Electrodes are made of a gas-permeable platinum layer.
• Measures oxygen levels to help fine-tune the air-fuel mixture and support fuel economy.
• Monitors exhaust gases to help reduce pollutants.
• A coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gases.

A worn sensor can show up as a poorly running engine, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. A damaged wiring harness or connector can lie behind those signs too, so look both over for physical damage before you replace the sensor.

The Audi models it fits include the 2019-2020 Audi A4 Allroad 2.0L and the 2019-2020 Audi A4 Quattro 2.0L, with one sensor per car. If your Audi isn't named here, find it in the "Vehicles it fits" section.

Specifications

Product information is for general reference and may contain errors. See our Disclaimer.