Instead of making 2 posts I am going to ask 2 questions in one. First, A friend gave me his key fob because he sold his car. The fob is programmed for the car he sold. Can it be erased and reprogrammed for my car? If there is any chance this could mess up my PATS trying to do this I do not even want to attempt it. Second, Do our cars have cabin filters? I looked on oreilly's website and there is no listing for them. Thanks