- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- Mobiletron "OS-B403P" - Not available
CITROËN - ZX, XM, AX, Xantia, BX; PEUGEOT - 405, 605; FIAT - Ducato, Punto; FORD - Escort, Sierra; ALFA ROMEO - 155, 164