Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture Fispa "90243OQ" - Not availableBMW - 3 (E91, E92), 1, X1, X3, 5 (E39, WB), X6, X5; MINI - Cooper, Countryman, Clubman