This model is only the for the face plate. It will fit the back piece provided by @jmynheir_242959. His model can be found here:
https://www.printables.com/model/193498-ford-4-button-key-fob
Not long after putting the key bundle in my pocket, did the car alarm go off because the buttons were sticking out. I could have cut a piece of PLA filament and glued it around like a bumper, but that'd be ugly and it might not last.
All the internal dimensions are the same as the original. Only the surface of the faceplate was raised 1.1mm so the buttons are protected from accidentally getting pressed.
My son helped with the remix using Blender, while I probed around in FreeCAD.
The author remixed this model.