- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- MERCEDES-BENZ - E-Class, S-Class, C-Class; FORD - Escort; PEUGEOT - 306; RENAULT - Megane; AUDI - A4; CITROËN - C5; ...