Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture VEGAZ "DLS-305" - Not availableBMW - 3 (E36, WB), Z3, 8, 5, 7; MERCEDES-BENZ - E-Class, S-Class; CITROËN - Xantia