- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- NTK "0397" - Not available
VW - Bora, Golf, New Beetle; AUDI - A4, A6; CITROËN - Xsara, C5; SEAT - Leon; SKODA - Octavia; ALFA ROMEO - 156; ...