The oxygen sensor installs in the upstream position on select 2015-2024 Audi and Volkswagen applications. It measures the exhaust air-fuel ratio across a broad range so the engine computer can meter fuel precisely. A built-in heater brings the element to operating temperature quickly after a cold start.

Walker Products 350-35147 Oxygen Sensor Features:

• Fits 2015-2018 Audi S3; 2018-2024 Audi A3; 2018 Audi A3 Quattro; 2020-2022 Audi A1; 2022 Audi Q3; 2019-2024 Volkswagen Tiguan
• Fits 2022-2023 Volkswagen Atlas, Atlas Cross Sport, Teramont with the 2.0L I4 engine
• Sensor location by application: B1S1 (bank and sensor number)
• 5-wire wide-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 740 mm (29.1 in.) overall length
• Male oblong connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue