- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- Delphi "ES21648-12B1" - Not available
SEAT - Ibiza, Toledo, Leon, Ateca, Alhambra; SKODA - Fabia, Rapid; VW - Polo, Golf; AUDI - A1, A3