I believe this would be simple enough, basically, if the driver of a vehicle Self Deletes while in the vehicle, the vehicle would explode/die. This would help immensely with a race checkpoint system I'm thinking of (using events). Either that, or a vehicle checkpoint mod.
Edit: This also needs to work for vehicles that don't normally explode, and, unlike the fizzler event just released, the vehicle needs to respawn too.
Edit2:(Polls are fun)