Dealerships aren't the only ones lacking in attention to detail.
Back in the days of my youth I had a '68 1600 BMW. I had an offset head-on collision, that term didn't exist back then I don't think, and it went to the body shop for estimates and repairs. I thought they'd total it for sure as I'd only paid $1600 for it a couple of years before. Well, they decided to fix it, much to my surprise and relief.
When I got it back 6 weeks later, I noticed a second 'thunk' whenever I closed the driver's door. Didn't think much of it until I noticed it would 'thunk' when going around corners too (living in Mendocino County at the time, great roads up there).
So one Saturday I decided to take off the driver's side door panel to see what was up with the 'thunk'.
This is what I found inside the door....(screw driver shown for size comparison only)...