If you're using a minigame, just set the vehicle respawn time.
Default events directly on vehicle spawn (worth a try though)[0] Onblownup - self - setvehicle - NONE[30000] Onblownup - self - setvehicle - (any vehicle)^ 30 secs Vehicle events (idk if there is this event, [Onvehicleblownup] but it is 100% guaranteed success) basically the same, but the starting event is different [0] Onvehicleblownup - self - setvehicle - NONE[30000] Onvehicleblownup - self - setvehicle - (any vehicle)Hope this helps.
and those events would be in the vehicle spawner.
Using vehicle events maybe? http://rtb-archive.host22.com/add_ons/Event_Vehicle.zip
RTB's dead.