go to documents/beamng.drive/vehicles and delete all the unnecessary folders. (if you don't have any custom configs, you should just be able to delete the whole lot.)
Clean your own garage! I'm busy with my mess! View attachment 706347 Just kidding. Seriously, try deactivating some of your mods, one by one until the "mess" goes away. I've seen mods that add on to other mods that will do the same thing.
Try clearing cache, as since the last update the game sometimes creates folders for vehicles that you no longer have but they are still in cache. (Happens with some maps too.) Also disable Firwood Police Skin Pack if you have it and if this won't work.
Guys i've done everything you mentioned above unless the reinstall ofthe gamewhich is something i want to avoid
Have you tried running the game in safe mode or disabling certain mods to see if one of them is the cause? One of the derby mods added 3 Gavril H-series van configurations with no preview to my game, for example:
That means that you do have leftover configurations in your user folder. Go to documents/BeamNG.drive/vehicles and remove all of the folders named the same as the names of "ghost cars" in your vehicle selector