- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- AUDI - A4, A6, TT, A8, A3; FIAT - Punto, Doblo; CITROËN - Xsara, C5; ALFA ROMEO - 156; FORD - Focus; FERRARI - 458; ...