This 5-wire wide-band oxygen sensor fits select 2011-2025 Audi, Porsche, Seat and Volkswagen applications in the upstream position and 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 350-35100 Oxygen Sensor Features:

• Fits 2011-2018 Audi A8 Quattro; 2013-2018 Audi S6, S7, S8; 2014-2018 Audi RS7; 2015-2017 Audi A3 Quattro; 2016-2017 Audi S3; 2016-2018 Audi TT, TTS Quattro; 2017 Audi A3
• Fits 2021-2025 Porsche 718 Boxster, Cayman; 2015-2018 Seat Leon, Volkswagen Beetle, GTI, Jetta; 2015-2019 Volkswagen Golf R; 2018-2021 Volkswagen Atlas
• Also fits select Audi, Porsche, Seat and Volkswagen applications
• Sensor locations by application: B1S1, B1S2 (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, 700 mm (27.6 in.) overall length
• Male oblong connector at the harness end
• Platinum electrode layer with a protective coating against combustion residue