Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture Delphi "ES10957-11B1" - Not availableVOLVO - V70, C70, S60, 740, 440 K; ALFA ROMEO - 33, Alfasud; AUDI - Coupe, 200