Delete the 'NVR_emissive' dlc folder &/or remove the entry for it in 'dlclist.xml'.
Alternatively go into the folder using OpenIV & delete the '.ytd's for the problem vehicles.
By all accounts it should only happen if you have replaced the vehicles. Vanilla vehicles should work fine with the NVR_Emissive textures.
Deleting the folder/textures will cause no harm. The game will just fall back to vanilla textures
Thanks a lot! That did the trick. I used the 'NVR Vehicle Emissive Textures DLC' uninstaller that comes with the mod.
I haven't replaced any vehicles, but perhaps that's included in the NVR mod. Aside from NVR, the only mods I have is one to keep vehicles turned on when you exit them and another mod to increase the volume of car speakers when you're not inside them.