Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture VEGAZ "ULS-420" - Not availableBMW - 5, 6, 1, 3 (F30, F80), 7 (F01, F02, F03); MINI - Countryman, Cooper; ALPINA - B7