Removing and installing starter catalytic converter - vehicles with manual gearbox — AUDI

🧭 Before you start

Fits: Audi A6 C6 (4F, 2004–2011)

• Renewed: gaskets

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• Renew gaskets and self-locking nuts.Fit all cable ties in the original positions when installing.

🔧 Engine codes this applies to

📐 72 workshop diagrams for ASB

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Carefully pull engine cover panel off four retaining pins one after the other (arrows).
2. Remove bolt (arrow).
3. Unplug electrical connector for coolant shortage indicator switch F66 at bottom of expansion tank and move expansion tank to one side with coolant hoses (1) and (2) attached.
4. ⚠ Working on all parts of the exhaust system:Observe safety precautions when working on the exhaust system Safety precautions when working on the exhaust system. — Remove bolts (arrows) and detach heat shield for turbocharger.
5. Remove electrical connector (arrow) for Lambda probe G39 from bracket and unplug connector.

6. Move clear electrical wiring for Lambda probe.
7. ⚠ Working on all parts of the exhaust system:Observe safety precautions when working on the exhaust system Safety precautions when working on the exhaust system. — Remove nuts (arrows) securing starter catalytic converter to turbocharger and detach starter catalytic converter.
8. Remove bolts (arrows) and detach cross piece from subframe.
9. Remove front exhaust pipe .
10. Remove cover (1) for drive shaft in wheel housing (left-side).
11. Move clear electrical wiring harness at heat shield for drive shaft (left-side).
12. Remove bolts (arrows) and detach heat shield for drive shaft (left-side).
13. Remove starter catalytic converter. [Note: Renew gaskets and self-locking nuts.Fit all cable ties in the original positions when installing.]
14. Install front exhaust pipe .
15. Align the exhaust system so it is free of stress .
16. Install heat shield for drive shaft .
17. Install cover for drive shaft 66.
18. Install cross piece 40.
19. Install heat shield for turbocharger .

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