Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture RIDEX "3922L0199P" - Not availableBMW - 3 (E91, E92), 1 (E81, E87), 5, 6, 7 (E65, E66, E67), X6, X3, X1, X5, Z4