- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- NTK "1620" - Not available
AUDI - A4, A6, A8, Allroad, TT; BMW - 3, 5; ALFA ROMEO - 156, Spider; SKODA - Superb; VW - Passat