- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- FIAT - Punto, Panda, Fiorino, Tempra; ALFA ROMEO - 145, 146; LANCIA - Kappa; CITROËN - ZX; PEUGEOT - 306; FORD - Escort; ...