Removing and installing particulate filter - vehicles with manual gearbox — AUDI

🧭 Before you start

Clear the engine bay: engine cover, air ducts, air cleaner housing, expansion tank and air pipe. Free the G506 connector and move G450 aside on its hoses. Undo the two upper turbo-to-filter nuts and slacken the lower one, then from below remove the front pipe, unbolt the right drive shaft and the pipe bracket, spin the last nut off and lower the filter. Refit with new gaskets and nuts, align the exhaust free of stress and run the adaption.

Fits: Audi A4 Cabriolet B6/B7 (8H), Audi A4 B6/B7 (8E)

• Renewed: gaskets

Don't miss

• Loosen the bottom filter nut only a few turns at first so the filter cannot fall when the pipe comes off.
• Renew the gaskets and self-locking nuts between turbocharger and particulate filter.
• Charge air hoses and connections must be free of oil and grease; plug-in connector clips must engage audibly.
• After fitting a new filter, run the particulate filter ash mass calibration in Guided Functions.
• Align the exhaust system so it sits free of stress before final tightening.

Written for this job from the workshop steps below · TorqFix editorial.

🔧 Engine codes this applies to

📐 36 workshop diagrams for AVB

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

📋 Procedure

1. Unclip cover caps.
2. Unscrew nuts (arrows) and detach engine cover panel. Also pull out dipstick if necessary.
3. Remove insulation beneath cover panel (if fitted).
4. Remove bolts (arrows).
5. Remove air ducts (1) and (2).

6. Unplug electrical connector (1) at air mass meter G70.
7. Loosen hose clip (2) to remove air intake hose.
8. Move clear wiring harness at air cleaner housing and remove air cleaner housing (arrow).
9. Unbolt coolant expansion tank (arrow).
10. Unplug electrical connector for coolant shortage indicator switch F66 at bottom of coolant expansion tank and move coolant expansion tank to one side (with coolant hoses (1) and (2) attached).
11. Unplug electrical connector (1).
12. Move aside fuel hoses at air pipe.
13. Remove bolt (2).
14. Remove air pipe (arrows).
15. Take electrical connector (2) for temperature sender before particulate filter G506 out of bracket.
16. Unplug electrical connector and move wiring clear.
17. Unplug electrical wiring at exhaust gas pressure sensor 1G450(item 1).
18. Unscrew nut and detach exhaust gas pressure sensor 1G450 from bracket.
19. Leave hoses connected and move exhaust gas pressure sensor 1G450 clear towards bottom of vehicle.
20. Unscrew top nuts (2) and (3) securing turbocharger to particulate filter.
21. Loosen bottom securing nut (1) a few turns to prevent particulate filter from falling.
22. Remove front exhaust pipe .
23. Unbolt drive shaft (right-side) from flange shaft on gearbox.
24. Move drive shaft to the side.
25. Unscrew bolts (arrows) and remove bracket for front exhaust pipe.
26. Unscrew bottom nut (1) securing turbocharger to particulate filter by hand.
27. Detach particulate filter. [Note: Renew gaskets and self-locking nuts.Hose connections and hoses for charge air system must be free of oil and grease before assembly.Secure all hose connections with the correct type of hose clips (same as original equipment) Electronic parts catalogue.To ensure that the charge air hoses can be properly secured at their connections, spray rust remover onto the worm thread of used hose clips before installing.Fit all cable ties in the original positions when installing.]
28. Install temperature sender before particulate filter G506.
29. Install front exhaust pipe .
30. Install drive shaft 40.
31. When installing air intake hoses with plug-in connectors, ensure that the securing clip (arrow) engages audibly on the retaining lug (A).
32. Align exhaust system so it is free of stress .
33. After renewing particulate filter, perform adaption in "“Guided Functions”" mode, Particulate filter; ash mass calibration.

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