Removing and installing air cleaner: Audi A6 C6 (BAT, BDW, BNK)

🧭 Before you start

Fits: Audi A6 C6 (4F, 2004–2011)

Don't miss

• On USA vehicles the fuel hose is routed behind air intake hose (3).

🔧 Engine codes this applies to

📐 1 workshop diagram for BAT

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

📋 Procedure

1. Remove bolts (arrow).
2. Remove air ducts (1) and (2).
3. Unclip fuel hose (1). [Note: On USA vehicles the fuel hose is routed behind air intake hose (3).]
4. Unplug electrical connector (2) at air mass meter G70.
5. Detach air mass meter G70 from air intake hose (3).

6. Release clamps (arrows) and detach top section of air cleaner housing with air mass meter G70.
7. Remove 2 securing bolts (arrows) from air filter element.
8. Detach hose connections on air cleaner housing (bottom section).
9. Pull pin out of fastener (3).
10. Remove air cleaner housing (bottom section) and unplug electrical connector (2) on reverse side from variable intake manifold change-over valve N335. [Note: If the air filter element is very dirty or wet, dirt or water could reach the air mass meter G70 and affect the air mass value. This would lead to loss of power, since a smaller injection quantity is calculated.Always use genuine part for air filter element.Use a silicone-free lubricant when installing the intake hose.Secure all hose connections with the correct type of hose clips (same as original equipment): Parts catalogue]
11. Blow out water drain hose in bottom section of air cleaner with compressed air.
12. Clean salt residue, dirt and leaves out of air cleaner housing (top and bottom sections); use a vacuum cleaner if necessary.
13. Check for salt residue, dirt and leaves in air mass meter and air intake hose (engine intake side).
14. Check for dirt in air duct leading to air filter element.
15. When installing the air filter element, check that it is properly centred in the retainer in the air cleaner (bottom section).
16. Secure air filter element again with two bolts (arrows).
17. Fit the top section of the air cleaner carefully on the bottom section, without using force. Make sure the top section of the air cleaner is fitted straight on the air filter element. Note position of sealing lip on air filter element (to prevent air leaks).
18. Then secure top section of air cleaner on bottom section.
19. The remaining installation steps are carried out in the reverse sequence.

🎬 Video walkthrough

Independent video tutorial by AUTODOC (YouTube) — a helpful visual companion to the steps above.

How to change air filter on AUDI A6 (C6)

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