Catalytic converter with left front muffler, removing and installing

WARNING: This page is about a different car, the 2006 Audi A8, 2005 Audi A8, and 2004 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.

Remove engine → Engine, removing and installing .
Free up Heated Oxygen Sensor (HO2S) 2 G108 electrical wire.

Fig 1: Removing Catalytic Converter With Front Muffler From Exhaust Manifold

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove catalytic converter with front muffler from exhaust manifold - arrows -.

Fig 2: Disconnecting Electrical Connector (Brown) Of Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 And Free Up Electrical Wire

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect electrical connector - 3 - (brown) of Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 and free up electrical wire.

Fig 3: Removing Bolt On Bracket For Exhaust Pipe

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove bolt - arrow - on bracket for exhaust pipe.

NOTE:

Flex joint in front exhaust pipe must not be bent more than 10° , otherwise it may be damaged.

Fig 4: Removing Bolt On Bracket For Exhaust System And Catalytic Converter With Front Muffler

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove bolt - 1 - on bracket for exhaust system and remove catalytic converter with front muffler.

Installing

Installation is in reverse order of removal.

NOTE:

Replace self-locking nuts.
Replace gaskets.

Install exhaust system free of stress → Exhaust system, installing free of tension .

Torque specifications

Tightening torques → Exhaust system, assembly overview