We have several cars on dayZ and they are brilliant, only have a few problems that are progressively getting more annoying. This is the fact the cars lag and make your game crash resulting in the car spinning out and hitting a tree and therefore ruining The car and in some cases, killing your character off completely.
Nevertheless, another issue is the loot in the trunk of cars, if I were to put loot in sometimes it won’t let me or my friends take it back out again, making us wait til the server resets to get a slight chance of getting it out again.