- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- FAE "77406" - Not available
AUDI - A4, A8, A6, TT, A3; CITROËN - Xsara, C5; FIAT - Doblo, Ducato; ALFA ROMEO - 156, 166