- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- VEGAZ "ULS-174" - Not available
BMW - 5, 3, 7, 8, 6; MERCEDES-BENZ - E-Class, S-Class; CITROËN - XM, ZX; FIAT - Punto, Siena