- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- VEGAZ "ULS-56" - Not available
VW - Passat, Golf, Transporter, Vento, Polo; AUDI - A4; CITROËN - AX, C15; SEAT - Toledo, Ibiza; BMW - 7, 5