Removing and installing fuel filter - vehicles with 6-cylinder engine — AUDI

🧭 Before you start

Fits: Audi A6 C5 (4B)

• Opens: fuel

🔧 Engine codes this applies to

📐 60 workshop diagrams for AFB

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

📋 Procedure

1. Detach retaining clip (4).
2. Detach regulating valve (5) with fuel pipes still connected.
3. Disconnect fuel hoses (2) and (3) from hose connections.
4. Slacken nut (1) of clamp on bracket and remove fuel filter from bracket.
5. Push plastic insert onto new filter.

6. Fill new fuel filter with clean diesel fuel. This ensures that engine starts quickly.
7. Pay attention to O-ring in filter housing when fitting regulating valve.
8. Install regulating valve with fuel pipes still connected.
9. Attach retaining clip (4).
10. Push fuel hoses (2) and (3) onto hose connections and secure with hose clips.
11. Start engine and check fuel system for leaks (visual check).

🎬 Video walkthrough

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

How to change fuel filter AUDI A6 C5 Avant

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