A8L V8-4.2L (BFM) (2004)
Catalytic Converter: Service and Repair
Left Side Components
Left Side Components
‹› Before raising the vehicle on a hoist (wheels off the ground), activate the vehicle lift mode.
=> [ Exhaust Manifold ]
=> [ Catalytic Converter with Front Muffler ]
=> [ Front Muffler ]
=> [ Secondary Air Injection (AIR) Combination Valve ]
Exhaust Manifold
Removing
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Remove the engine. Refer to => [ Engine, Removing ] See: Engine, Cooling and Exhaust/Engine/Service and Repair/Engine, Removing.
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Free up the wire for the Heated Oxygen Sensor (HO2S) 2 (G108).
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Remove the catalytic converter with front muffler to exhaust manifold nuts - arrows -.
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Disconnect the electrical connector - 3 - (brown) for the Oxygen Sensor (O2S) 2 behind Three Way Catalytic Converter (TWC) (G131) and free
up the wire.
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Remove the bolt - arrow - for the exhaust pipe suspended mount.