A4 Quattro Wagon L4-2.0L Turbo (CAEB) (2009)
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Muffler: Service and Repair
Muffler Assembly Overview, A5 Cabriolet and A4 Wagon
1
Gasket
‹› Replace
2
Heated Oxygen Sensor (HO2S) (G39) and Oxygen Sensor (O2S) Heater (Z19)
‹› Threads on new oxygen sensors are coated with assembly paste
‹› When re-installing a used oxygen sensor, coat threads with hot bolt paste
‹› Assembly paste or hot bolt paste must not get onto slots of sensor body.
3
Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) and Oxygen Sensor (O2S) Heater 1 (behind Three Way
Catalytic Converter (TWC)) (Z29)
‹› Threads on new oxygen sensors are coated with assembly paste
‹› When re-installing a used oxygen sensor, coat threads with hot bolt paste.
‹› Assembly paste or hot bolt paste must not get onto slots of sensor body.
4
Catalytic converter
‹› Protect catalytic converter from shocks and impact stress
