I joined the forum to learn how to replace the cabin air filter on my wife's 2010 3S. Used the search feature and found nizzy1115's DIY thread "How to change the cabin air filter." This excellent tutorial plus the 8 pages of questions, experiences and suggestions have me fired up to git er done! Picked up the filters from the dealer today for $32.00 including tax, and when my grandson returns the Mazda (his Audi A5S is in the body shop) I think the replacement will go well. I'll post in nizzy's thread to brag or beg for help!