My headlights and taillights on my ugly Roamer are black. So is the fender and the bottom below the grill. Missing textures on the knobs and center mirror. It's probably UV maps. And the front bumper moves around freely when driving. How do I fix that? I don't know if anyone would want to take a look but I'd be glad if someone did. I moved it here instead of mod support. Sorry for 2 threads.
You should open .dae file in Blender, choose bumper, then press Ctrl (left) + A, after that you will see a window, where you must choose "Location", then "Rotation and Scale". Your 3D coursor must be in null coordinates. It will fix the problem with flying bumper. Textures on headlights and taillights you can change in Material Editor (F11). I hope my tips will help you
Check your UV Maps. Looks like you broke them while editing the mesh. For the knobs, make sure the material they are trying to use actually exists.
No.. Open the diffuse texture of the roamer body, you will see it has to match exactly the original one. Having to re-do an entire UV is very rare. I suggest to start over, as you probably broke the UV of those parts.