- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- EFI "301409" - Not available
CITROËN - ZX, Xsara, AX, XM; PEUGEOT - 405, 406; FIAT - Punto, Panda; FORD - Escort, Sierra; ALFA ROMEO - 155; ...