Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture Metzger "0893223" - Not availableBMW - 3 (E46, WB), 5 (E39, WB), 7, Z3, X5, X3, 8; ALPINA - Roadster V8