- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- NTK "90899" - Not available
AUDI - A4, A3, TT, A5, A6; BMW - 3, 1; MAZDA - 6; ALFA ROMEO - 159, Spider; BENTLEY - Continental