Removing and installing fuel filter - vehicles with 4-cylinder engine (unit injector) — AUDI

🧭 Before you start

Fits: Audi A6 C5 (4B)

🔧 Engine codes this applies to

📋 Procedure

1. Pull dipstick (1) out of guide tube.
2. Unclip cover caps.
3. Unscrew nuts (arrows) and detach engine cover panel.
4. Remove insulation beneath cover.
5. Re-insert dipstick in guide tube.

6. Unplug electrical connector (2).
7. ⚠ The fuel system is pressurised. Before opening the system place a clean cloth around the connection. Then release pressure by carefully loosening the connection.In extreme cases the fuel lines and the fuel can reach a temperature of 100 °C on vehicles with unit injector engine. Allow the fuel to cool down before disconnecting the lines - danger of scalding.Wear protective gloves.Wear safety goggles. — Remove bolt (1).
8. Lift off cooling element with fuel filter flange from fuel filter and move clear to one side with fuel hoses connected.
9. Loosen clamping bolt (2) on bracket.
10. Remove fuel filter (1) from bracket.
11. Lubricate new seals with diesel.
12. Fill new fuel filter with clean diesel fuel. This ensures that engine starts quickly.
13. Fit fuel filter (1) in bracket and tighten clamping bolt (2).
14. 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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