- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- NGK "91719" - Not available
PEUGEOT - 206, 307, 406, 306, 407; CITROËN - C5, Xsara; FIAT - Ducato, Punto; AUDI - A4, A6; LANCIA - Zeta