Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture REAL "8029447TOE" - Not availableBMW - 3, 5 (F90, G30), 6 Gran Turismo, X5, X6, X7, 7 (G11, G12), X3, X4