A8L Quattro Sedan V8-4.2L (BVJ) (2007)
Oxygen Sensor: Service and Repair
Oxygen Sensor Assembly Overview
Oxygen Sensor Assembly Overview
Connectors
1. To the Heated Oxygen Sensor (HO2S)
2. To the Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC)
3. To the HO2S 2
4. To the O2S 2 behind TWC
Cylinder Bank 1 (Right) Sensors
1. O2S behind TWC
2. HO2S
Removing and installing, refer to => [ Oxygen Sensors, Cylinder Bank 1 ] See: Oxygen Sensors, Cylinder Bank 1.
Tightening specification: 55 Nm.
Cylinder Bank 2 (Left) Sensors