I'm having the same issue but a little bit different. The car does not crash the game, but it cannot spawn. It says "Model does not exist" in trainer, and "Vehicle does not exist in addon car spawner. It seems like the game is not reading the mod nor loading the mod. I've been modding for quite a long time and know what to do, but I found no solution to this problem. If someone found a solution to this problem, please help me.