- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- RECOFICIAL "CSL2451" - Not available
KIA - RIO, Ceed, PRO Ceed, Soul, Venga; HYUNDAI - I30, I20; BMW - 3, 5; AUDI - A4, A3