Removing and installing front exhaust pipe with main catalytic converter - engine code letters AFB AKN — AUDI

🧭 Before you start

Fits: Audi A6 C5 (4B)

• Renewed: gaskets

Don't miss

• Secure brake disc with wheel bolts.
• Illustration shows vehicle from model year 2002 onwards.
• Illustration shows vehicle with manual gearbox.
• Renew gaskets and self-locking nuts.

🔧 Engine codes this applies to

📋 Procedure

1. Detach engine cover caps.
2. Unscrew nuts (arrows) and lift off engine cover panel.
3. Remove heat shield above turbocharger (arrows).
4. Unbolt front exhaust pipe on exhaust elbow for turbocharger (arrows).
5. Remove front left wheel. [Note: Secure brake disc with wheel bolts.]

6. On vehicles with auxiliary/additional heater, remove bolts (arrows) securing exhaust pipe for auxiliary/additional heater to noise insulation.
7. Release fasteners (1 … 5) and take off front and rear noise insulation. [Note: Illustration shows vehicle from model year 2002 onwards.]
8. Remove bolt (2) from noise insulation cover above drive shaft (left-side).
9. Disengage hook (1) and detach noise insulation.
10. Unbolt heat shield (1) for drive shaft (left-side).
11. Unscrew nut (arrow) at bracket for front exhaust pipe. [Note: Illustration shows vehicle with manual gearbox.] [Note: To avoid any damage, the flexible joint in the front exhaust pipe must not be bent more than 10°.]
12. Separate exhaust system at clamps (1) and (2).
13. Detach front exhaust pipe with main catalytic converter. [Note: Renew gaskets and self-locking nuts.]
14. Align the exhaust system free of stress .

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