Andy Hedin

Questions about replacing the interior dust/pollen air filter pop up from time to time, so since I recently replaced mine I figured some other folks might like to see some instructions on this simple process.

I purchased a German-made Mann dust/pollen filter from Adirondack Auto Brokers for $19. This filter came with a small set of illustrated instructions, so I decided to scan the images from those instructions and add some descriptive instructions of my own, the result is the PDF file which you can open or save from the link shown below.

The images shown here are based on the early A4's that don't have the extra plastic shroud in between the two firewalls. The filter replacement procedure for the newer A4's is the same as shown here except that you'll need to remove that top shroud also.<ul><li><a href="http://members.aol.com/ajhedin/A4/Pollen_Filter.pdf">How To Replace Audi A4 Interior Dust/Pollen Air Filter (314k PDF file)</a></li></ul>

Speedy

Thanks Andy, nice job!

WYSIWYG

very good, thanks

realdeal

How often should this get replaced?....Very cool THX

Andy Hedin

....every 30,000 miles. I think that may have changed with the newer A4's....perhaps every 20,000? I'm not quite sure. Check your Owner's Manual for exact interval for your A4.

audiohs

Nice write-up. Do you have part # for the filter?

Andy Hedin

I don't have it handy here at work, but I can post it tomorrow for you.

Kirk

... here in Ottawa, I don't think they changed mine at my last servce (when they should have). I checked it a couple of weeks ago, just after service, and it was very dirty.

Kirk

Audi2Ody

Nice job! Now I gotta go check to see just how dirty it is! ;-)

Andy Hedin

....and the number in the Mann filter installation instructions was CU 3955.