Removing and installing catalytic converter with front silencer (right-side) — AUDI

🧭 Before you start

Fits: Audi A8 D3 (4E, 2002–2010)

• Renewed: self-locking nuts, gaskets

Don't miss

• The flexible pipe connection (de-coupling element) on the front exhaust pipe must not be bent more than 10° - otherwise it can be damaged.
• Renew self-locking nuts.Renew gaskets.

🔧 Engine codes this applies to

📋 Procedure

1. Remove bolts (arrows) securing exhaust pipe for auxiliary/supplementary heater to noise insulation.
2. Remove noise insulation (1...4).
3. Drain off coolant .
4. Remove air cleaner 24.
5. Unbolt coolant pipe (right-side) (arrows).

6. Detach coolant pipe (arrow) and remove.
7. Move electrical wire for Lambda probe G39 (before catalytic converter) clear.
8. Unbolt catalytic converter with front silencer from exhaust manifold (1 ... 3).
9. Unplug connector (2) (black) for Lambda probe after catalytic converter G130.
10. Remove bolt (1) on bracket for exhaust pipe.
11. Detach heat shield (2).
12. Move electrical wire for Lambda probe after catalytic converter G130 clear. [Note: The flexible pipe connection (de-coupling element) on the front exhaust pipe must not be bent more than 10° - otherwise it can be damaged.]
13. Remove bolt (2) on bracket for exhaust system and remove catalytic converter with front silencer.
14. Install in reverse order. [Note: Renew self-locking nuts.Renew gaskets.]
15. Align the exhaust system so it is free of stress .
16. Install air cleaner 24.
17. Fill system with coolant .

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