Replacing the fuel filter (Audi A4 B6)

The fuel filter is of such a size that it is generally not necessary to change it. Despite this, when refueling with the wrong fuel and other similar cases, it may be necessary to remove the filter. In fact, due to the fact that the filter is installed on the bottom of the body behind the fuel tank, the filter should be replaced in a workshop. Anyone who has a lift with a platform, or who can get under the car, having first securely installed it on trestles, can change the filter themselves. Pay attention to sufficient ventilation of the workplace. When removing the filter, some fuel may leak out. Fuel vapors are toxic and flammable.

1. Disconnect the battery ground cable. Place the rear of the vehicle on jack stands.

2. Remove the cover on the right, next to the fuel tank (arrows) and place a container under the tank to receive the fuel.



3. Remember about the pressure in the system, put a rag on the pipes. Then, carefully loosen the connection, relieve the pressure.

4. Disconnect fuel lines 1 and 3 (press the unlock button) and unscrew screw 2. After this, you can remove the fuel filter.





5. In the case of a turbocharged engine, in order to remove the filter, it is necessary to remove the return line 1, the supply line from the fuel tank 2, the supply line to the engine 3 and the air bleed line 4, and also unscrew the screw 5.



6. When installing, which is done in the reverse order, it is necessary to ensure that the appropriate direction of fuel flow is observed, this direction is indicated by an arrow. Arrow 1 on the filter must be directed towards arrow 2 on the holder.





7. The purpose of the connections in the case of a turbocharged engine is indicated on the filter (see fig. to p.5): 1 - return line "RL", 2 - supply line to the fuel tank "VL", 3 - supply line to the engine "MOTOR", 4 - air outlet line "E".

8. After a test drive, check the tightness of all hose connections.

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