Every time i load in a car that is a mod or a default car that comes with the game, it cant drive, my speedometer is all red. I would tell you the error message that i got but for the 1 second it was up before it disappeared i cant remember. This has been happening for around 5 -6 months (i play once a month to see if the issue if fixed). Please help? I posted this issue on a separate thread but no one really replied to fix the issue :l That was like last year i think to. Ill be back next month to check the replies.
Have you tried safe mode an clearing cache? If at fails, verify game integrity. If that also fails, you need to do a clean reinstall.
What version of the game are you running? Have you updated on the last 5-6 months? Either way, clear cache, run in safe mode, and then delete the Documents/BeamNG.drivs folder of all else fails.