- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- Delphi "ES21147-12B1" - Not available
PEUGEOT - 306, Partner, 307, 206, 607; CITROËN - C5, Berlingo; AUDI - A4, A6; ALFA ROMEO - 156, 166