Well, I have been ignoring it for quite a while and finally did something about it. At first I heard a chirping, light random squeak over some bumps from what I thought was the rear wiper area. It sounded like the motor bolts were loose (IMO). I put it off and figured if it got worse I would look into it. Well, after a few months it developed into a full blown, consistent rattle. Come to find out, the screws for the hatch, (lid, back-door...whatever you would like to call it)...had become so loose, that one of the three had fallen out. This was an easy fix. Two plastic set screws on each side of the latch and a firm, but easy pull on the plastic panel allowed enough access to the screws to perform the repair/fix. I suspect that either the body shop that did the repairs over a year ago did not tighten these properly or that just over time the screws worked loose. Anyway, I plan to replace two of the trans switches tomorrow to address a shift quality issue. Hope this might help others. Take care.