Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture Autoteam "M0120" - Not availableBMW - 3 (E36, WB), 5 (E39, WB), Z3, 7; VOLVO - S40, V40; OPEL - Astra, Vectra