- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- ESTANFI "EST-DOX-2039" - Not available
BMW - 5, 6, 7 (F01, F02, F03), 3, 1; MERCEDES-BENZ - C-Class, CLK; AUDI - A4, TT; ALFA ROMEO - 156, 166