A3 Quattro V6-3.2L (CBRA) (2009)
Oxygen Sensor: Locations
Component location of oxygen sensors before catalytic converter
‹› In front exhaust pipe.
1. Heated Oxygen Sensor (HO2S) 2 (G108) before catalytic converter with Oxygen Sensor (O2S) 2 Heater ( Z28)
2. Heated Oxygen Sensor (HO2S) (G39) before catalytic converter with Oxygen Sensor (O2S) Heater (Z19 )
Component location of oxygen sensors behind catalytic converter
‹› In catalytic converters.
1. Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) with Oxygen Sensor (O2S) 1 (behind Three Way Catalytic
Converter (TWC)) Heater (Z29)
2. Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (G131) with Oxygen Sensor (O2S) 2 (behind Three Way Catalytic
Converter (TWC)) Heater (Z30)