- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- Topran "723 481" - Not available
CITROËN - C4, DS3, C5, DS4, C3; DS - DS 4, DS 3; BMW - 3, 5; AUDI - A4, A3; PEUGEOT - Partner; ALFA ROMEO - 159, 156