The 5-wire wide-band oxygen sensor is a replacement sensor for select 2017-2026 Audi, Porsche and Volkswagen applications in the upstream position. 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 250-25146 Oxygen Sensor Features:

• Fits 2019-2020 Audi A8 Quattro; 2020-2026 Audi RS Q8, SQ7, SQ8; 2020 Audi S8; 2021-2026 Audi RS6 Avant, RS7 Sportback; 2017-2019 Porsche Panamera
• Fits 2018-2023 Volkswagen Atlas; 2020-2023 Volkswagen Atlas Cross Sport
• Engine coverage includes 3.6L V6, 4.0L V8 applications
• 5-wire wide-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 875 mm (34.4 in.) overall length
• Female circle connector at the harness end with 6 terminal terminals
• Platinum electrode layer with a protective coating against combustion residue