- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- Fenox "OS81010" - Not available
VW - Golf, Jetta, Touran, Polo, Up; SKODA - Fabia, Roomster; SEAT - Toledo, Leon; AUDI - A4, A3