Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture GAUSS "GO8462" - Not availableAUDI - A4, A6, TT, A8, A3; VW - Golf, Bora; ALFA ROMEO - 156, 166; ABARTH - 500, 595