I have read that a few people have found dead mice, etc in their ac units. I am wondering where they can crawl in and where they end up? I am a ...unique smell in my car that I can't find. I have already changed the interior cabin air filter and spayed the vents with mold killer. Is there an outside air intake other than the one at the windshield wipers?
Start with THIS THREAD. It should have the info you want and/or links to other info on how to block the areas that the rodents get in.