The 4-wire narrow-band oxygen sensor is a replacement sensor for select 2012-2021 Audi, Seat and Volkswagen applications. It signals whether the exhaust is running rich or lean so the engine computer can trim fuel delivery. A built-in heater brings the element to operating temperature quickly after a cold start.

Walker Products 350-34989 Oxygen Sensor Features:

• Fits 2012-2016 Audi A8 Quattro; 2018-2019 Seat Arona, Ibiza; 2016-2017 Volkswagen Caddy; 2020 Volkswagen Jetta; 2020-2021 Volkswagen Virtus
• Engine coverage includes 1.2L I4, 1.6L I4, 6.3L W12 applications
• Used in both upstream and downstream positions, depending on application
• 4-wire narrow-band oxygen sensor
• Built-in heater for fast warm-up
• M18x1.5 threaded mounting with a 22 mm hex, 750 mm (29.5 in.) overall length
• Male/female oblong connector at the harness end with 4 spade terminals
• Platinum electrode layer with a protective coating against combustion residue