I keep seeing mentions of inspections for cars, either yearly or when sold. I was wondering what they generally check and how they do it. Also, do many states do this? Illinois has no inspection other than an emissions test which is a joke. Good ol Governor Blagoyavich changed the law here in Illinois. Any vehicle that is not OBD ( I think thats 95 and before) does not get tested at all. The vehicles that do get tested are simply plugged in and scanned for codes, and are checked every 2 years. Basically if you haven't seen a check engine light, you pass. But if you drive a beater spewing noxious fumes into the atmosphere. don't worry about it, you don't have to test it anyway. Is Illinois the only state that is so bass ackwards about auto safety and the environment?