- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- Delphi "ES21171-12B1" - Not available
FORD - Focus, Fiesta, Kuga, Puma, Grand C-MAX; HYUNDAI - I30, Santa FE; AUDI - A3, A6