Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture VALEO "368449" - Not availableBMW - 5, X3, 3, 7 (F01, F02, F03), 1, 6, X5, Z4, X1, X6; MERCEDES-BENZ - C-Class