- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- Delphi "ES21476-12B1" - Not available
VW - Golf, Touran, Passat, Tiguan, Transporter; AUDI - A3, A4; SKODA - Octavia, Fabia; SEAT - Altea, Alhambra