Is it possible that a car's onboard computer could get a virus?

If I downloaded some music from an illegal download site like Pirate Bay or BearShare or LimeWire and burned the music onto a CD and listened to the CD on my car's CD player whilst driving along, or if I had a car with an iPod dock and I docked an iPod with a virus or something could the car's onboard computer get a virus, and if it did would anything that could be deadly if affected be damaged? Modern cars have onboard computers that control certain things. If a car has ABS then this means that a computer controls the brakes when you brake to ensure the car doesn't skid. Computers control other things on cars as well, like cruise control, GPS and automatic transmission (that is, obviously, if the car has these features). If the answer is yes then thank God I only have a Vauxhall Corsa because anything more high tech like a Fiat 500 or a Range Rover would be pretty much undriveable and would have to be taken to the dealer using a tow truck to be sorted out.