- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- Delphi "ES21089-12B1" - Not available
AUDI - A3, Q2, A4, A6, S6; SEAT - Leon, Ateca; SKODA - Octavia, Karoq; VW - Golf, Polo