Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture EPS "1.998.607" - Not availableTOYOTA - Yaris, Prius, Vios, Corolla; BMW - 3, 5; AUDI - A4, A3; ALFA ROMEO - 159, 156