- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- FAE "77911" - Not available
VW - Golf, Bora, Polo, New Beetle, Phaeton; AUDI - TT, A3; SKODA - Octavia, Fabia; SEAT - Leon, Ibiza