Removing and installing front exhaust pipe with starter catalytic converter — AUDI

🧭 Before you start

Fits: Audi A3 (8P, 2003–2012)

Don't miss

• To avoid damage, the flexible joints in the front exhaust pipe must not be bent more than 30°.
• Disregard (item 1).

🔧 Engine codes this applies to

📐 22 workshop diagrams for BAG

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

📋 Procedure

1. Unclip air intake hose from air duct (arrows).
2. Unplug electrical connector at intake air temperature sender 2G299(item 2).
3. Detach vacuum hose (1) from actuator for intake air preheater.
4. Pull dipstick (1) out of guide tube.
5. Remove the engine cover together with air cleaner housing (arrows).

6. Re-insert dipstick in guide tube.
7. Detach rubber bellows (1) from air duct (2).
8. Release both retainers (arrows) and detach air duct.
9. Unbolt hot air collector plate (arrows).
10. Unbolt front exhaust pipe from exhaust manifold (arrows).
11. Remove centre noise insulation (fasteners 1 ... 3).
12. Unplug electrical connector (2) for Lambda probe G39.
13. Unplug electrical connector (1) for exhaust gas temperature sender 1G235 (if fitted).
14. Unplug electrical connector (4) for reversing light switch F4.
15. Move engine wiring harness at bracket (3) clear.
16. Unscrew nut (arrow) and remove bracket with wiring from stud.
17. Unplug electrical connector (2) for Lambda probe G39.
18. Unplug electrical connector (1) for exhaust gas temperature sender 1G235 (if fitted).
19. Remove all electrical connectors from the bracket.
20. Remove nuts (2) and (3) at exhaust pipe flange.
21. Separate exhaust system at flange.
22. Remove bolts (1) and (5).
23. Pull off bracket (4) for exhaust system from pins on front exhaust pipe.
24. Unscrew bolts (1 ... 3) and remove pendulum support. [Note: To avoid damage, the flexible joints in the front exhaust pipe must not be bent more than 30°.]
25. Unscrew bolts (arrows) and remove bracket for front exhaust pipe.
26. Swing front exhaust pipe forwards and remove. [Note: Disregard (item 1).]

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