So for those of you that have never changed your cabin filter in your car, I would HIGHLY recommend it. I pulled mine out of my car and have never replaced it before an it was disgusting. I can't even believe that my car's heater or vents even worked. For the cost around $15 I highly recommend it. They say every 30-35k replace them. Now I am going to replace them in the rest of my vehicles. They are normally located behind the glove box and probably takes about 10 minutes to replace.