personally I like KateKate42's suggestion best and as for Jay-T's suggestion that is way too cruel. I just love cats but like all animals they really don't know the harm they are doing.

Perhaps the cat is tame (perhaps abandoned) and needs a home. I would suggest getting a live trap from the human society and capturing him/her. If it where me I would have the cat "fixed" and find it a home. But if anything I would put a towel down on the car with some cat-nip.