- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- EFI "301780" - Not available
BMW - 3, 5, 1, 6, 7; KIA - Picanto, RIO; AUDI - A4, A3; HYUNDAI - I40; ALFA ROMEO - 159, 156