D2 A8/S8 (1997 - 2003)
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Did my oil today - same issue!
Posted by: Riceroni_28 (103385) on 2018-04-09 02:16:41
In Reply to: Changed oil today. Old filter was falling apart. posted by 4Driver4 on 2018-04-07 22:52:54

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I had a Bosch filter in. I realized after I took it out that there was some sort of gasket at the bottom that was likely preventing the filter from being locked in correctly. I also had a Mahle filter on hand and they have rubber gaskets inside them. The Bosch one that came out (and identical one that went in) do not have the gasket (some sort of foam instead). I'm guessing that gasket fell off an old Mahle filter in an oil change in the last and has been preventing my filters from fitting right. Mine was all falling apart and the top casing separated from the filter paper and got stuck in the bottom of the filter housing. Took me a fight to get it out...

If it has foam/cloth/felt (?) on top and bottom near the center core of the filter, I'd guess it was a Bosch filter.
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