Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture VEGAZ "DLS-418" - Not availableAUDI - A6, A4, A8, A3, Cabriolet; VW - Passat, Sharan; SKODA - Superb; BMW - 3, Z4