Closing the driver side door on my '06 NBC last week it came loose all along the bottom. Just wondering if this is something that I can tackle to fix or is it going to mean another expensive trip to the dealer?
From what I remember, from taking ours apart to replace broken window regulators, there are three screws at the bottom of the door. It could be that whatever they screw into is messed up. Ours weren't holding well on one door, so whoever worked on it last used some sort of really black sticky stuff on the screws to keep them from falling out. Not the best solution, but it seems to have worked. It just makes getting the screws out a pain since they stick when you try to unscrew them.
You should be able to buy new screws, and possibly the parts they screw into, at the parts counter of your local VW dealer.
If it were me, I'd lay down on the ground and visually inspect the bottom of the door, looking for the screws to see if they're even on the door. They could have been pulled loose and fallen out. Use the "good" door on your car as a reference. Both doors are assembled the same way.