The biggest reason you don’t want a vehicle to go through probate is because they depreciate over time. The longer the probate process drags on the less the vehicle is worth. A car worth $15,000 this year might be worth $10,000 the next. The sooner your heirs can get the vehicle transferred into their names, the more they will be able to sell it for. It only makes sense to pass your vehicles to your heirs outside of probate.