As others mentioned are the eye's aliened with corresponding receivers,also how old are the sensors/whole kit & kabootal?
How are the wires to each sensor & receiver have you inspected them,did any of them get pinched or broken during the beatings
if the wires look ok are the sensors getting power can you check for continuity,it would be nice to say that it could be just a broken circuit.
If all four sensors are energized how's the wall mount switch,is it working,if they sensors respond properly to the wall mount then maybe the wireless remotes should be looked at maybe just a simple cleaning of the contacts,they sometimes get dust build up and stick.
Hey Mike do you have home link on either car?