- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- EFI "301111" - Not available
BMW - X5, 3, 1, 5, 7; AUDI - A4, TT; MERCEDES-BENZ - C-Class; VW - Golf, Bora; SKODA - Octavia; SEAT - Leon; ...