- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- NTK "0169" - Not available
BMW - 3, 5, 6, 1, 7; AUDI - A4, A3; HONDA - Accord; ROVER - 600; ALFA ROMEO - 159, Spider; CADILLAC - CTS, SRX