- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- Delphi "ES21519-12B1" - Not available
SKODA - Fabia, Rapid Spaceback, Roomster; VW - Polo, Jetta; AUDI - A4, A6; SEAT - Toledo