- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- Delphi "ES21062-12B1" - Not available
CITROËN - C3, DS3, C4, DS4, Grand C4 Spacetourer; PEUGEOT - 308, 208; DS - DS 3, DS 4