Catalytic converter with right 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 .

Fig 1: Removing Water Pipe At Right

GW00028765

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove water pipe at right - arrows -.

Fig 2: Disconnecting Water Pipe

GW00028766

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect water pipe - arrow - and remove.
Free up Heated Oxygen Sensor (HO2S) G39 electrical wire.

Fig 3: Removing Catalytic Converter With Front Muffler From Exhaust Manifold

GW00017879

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

Fig 4: Disconnecting Electrical Connector (Brown) Of Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 And Free Up Electrical Wire

GW00028762

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect electrical connector - 2 - (black) of Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130.

Fig 5: Removing Bolt On Bracket For Exhaust Pipe & Heat Shield

GW00028767

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove bolt - 1 - on bracket for exhaust pipe.
Remove heat shield - 2 -.
Free up Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical wire.

NOTE:

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

Fig 6: Removing Bolt On Bracket For Exhaust System And Catalytic Converter With Front Muffler

GW00028764

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove bolt - 2 - 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