Did you ever figure out a way to add a cabin air filter to your '01? I've got an '00 and the dust that accumulates inside is driving me nuts! I've spent hours scouring the interwebs for a modification or retrofit write-up but haven't found anything yet.Holy bananas I didnt even realize that it didn't have one! Shit! My parents '95 Volvo 850 had one(I almost convinced them to sell it to me... I only kind of miss it)! Haha, guess you learn something everyday. This is my first car so everything is a learning experience. Maybe I'll mod the sucker so that it fits
Edit: After looking at it a bit, I might be able to put something together on AutoCAD and get it 3D printed. That way I could easily replace the filter.