@Bart1 Thanks for the Images,
In the context of that car, I’d start by opening up that ‘Body’ material to see what’s in it.
Try putting that oldcar_texture_0 inside of the material and feeding it into ‘base color’
If you don’t see any changes: open up the old car skeletal mesh (the one with the pink underline) and make sure the ‘Body’ material is assigned.