Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

Fuel Filter Replacement Instructions

Model: Audi A6 C6, MK 3 - Years: 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
Part: Diesel fuel filter

See other generations:
Video tutorial

To access the fuel filter, first remove the plastic cover above the engine: the filter is located at the rear, near the coolant reservoir. Ensure that the new filter is compatible (shape and position of the inlet and outlet pipes) and that the package includes new O-ring seals.

Then, unscrew the screws securing the radiator reservoir without disconnecting the hoses, so you can move it and facilitate the filter replacement; open the clamps on the supply and return hoses and move them back to slide the hoses off, remove the retaining clip for the fuel supply hoses, and extract the corresponding plastic fitting; then unscrew the clamp screw for the filter and remove it from its housing to insert the new one; once the new filter is secured (it is not recommended to fill it with diesel from the old filter, which may be dirty, but to use clean diesel), insert the supply fittings to which the new O-ring seals must be applied, securing it with the retaining clip and the outlet and return hoses to be secured with the clamps.

Reattach the reservoir and the engine cover.


Updated on 13 February 2026 by ScegliAuto


Related tutorials

How to Replace the Fuel Filter on an Audi A6
How to Replace the Fuel Filter on an Audi A6
Audi A6 (2004-2012 / C6, MK 3) Need to replace the fuel filter on an Audi A6? Let's see how to remove it from the engine compartment. Use a screwdriver to unscrew the screws that s…
How to Unlock the Fuel Door on Audi A6
How to Unlock the Fuel Door on Audi A6
Audi A6 (2011-2018 / C7, MK 4) How do you unlock the fuel door on the Audi A6? Let's go through the disassembly steps to unlock the fuel door. Open and lift the trunk lid, remove t…
How to Remove the Fuel Pump on Audi A6
How to Remove the Fuel Pump on Audi A6
Audi A6 (1997-2004 / MK 2, C5) Learn how to remove the damaged fuel pump on an Audi A6. Remove the rear seat cushions, then use a socket wrench to unscrew the metal cap's securing …

Other guides you may be interested in

How to Reset the Tyre Pressure Warning Light on a Kia Rio?

The tyre pressure warning light displayed on the instrument cluster of the Kia Rio can be reset by inflating the tyres until they reach the recommended pressure value: this value is indicated on the sticker affixed to the driver's door pillar. Once all tyres have been inflated to the recommended pressure, turn on the ignition to check that the light has disappeared: if it is still present, it may be necessary to drive for a few miles, allowing the sensors to work and thus turning off the light.

Watch the video!


by ScegliAuto

More videos