I bought a 2013 Hyundai Sante Fe in March of 2013. In the 30 months I have owned the car they have told me 3 TIMES my cabin filter is dirty and is due to be replaced. Today when I went in for my free oil change they even brought the dirty filter out to me in the waiting room and with everyone there looking on mentioned how bad it was and strongly suggested having it changed. I declined as I really don't see it as an important thing just a money grab. In the 30+ years I have been driving this is the only vehicle I have owned that they have even mentioned a cabin filter to me. Before this I didn't know such a thing existed.
My understanding of it's function is to provide cleaner air for the interior of the car. My view is rolling down a window does the same thing. Can anyone with knowledge give me some insight on this. Is it a necessary filter or is it a $90 cash grab.