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

🧭 Before you start

Fits: Audi A6 C6 (4F, 2004–2011)

• Renewed: gaskets

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• Bolt (2) and nut (3) are removed at a later stage.
• Renew gaskets and self-locking nuts.Fit all cable ties in the original positions when installing.

🔧 Engine codes this applies to

📐 53 workshop diagrams for CANA

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

📋 Procedure

1. Remove front exhaust pipe .
2. Remove nuts (accessible from below) (1) for heat shield. [Note: Bolt (2) and nut (3) are removed at a later stage.]
3. Carefully pull engine cover panel off four retaining pins one after the other (arrows).
4. Remove bolt (arrow).
5. 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.

6. ⚠ 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.
7. Remove vacuum pump 47.
8. Unscrew bolt (2) and nut (3) and remove heat shield.
9. Remove electrical connector (arrow) for Lambda probe G39 from bracket and unplug connector.
10. Move clear electrical wiring for Lambda probe.
11. Remove nuts (arrows) securing starter catalytic converter to turbocharger and lift off starter catalytic converter. [Note: Renew gaskets and self-locking nuts.Fit all cable ties in the original positions when installing.]
12. Install heat shield 50.
13. Install vacuum pump 47.
14. Install heat shield for turbocharger .
15. Install front exhaust pipe .
16. Align the exhaust system so it is free of stress .

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