My 05 TSX recently decided to develop an annoying rattling from the rear deck. The rattles appears only when the car is moving during both low and high speeds and completely stops when I am idling. Does anyone also have the same problem I am experiencing? I tried looking around the trunk area and moving the metal parts but doesn't seem to be any loose metal parts. Argh, its driving me crazy. Anyone please help!

 

Someone had this and it is a support bar that goes across the back deck, seen from in the trunk. Guess there is a tight fit on the driverside and sometimes it hits. I believe the solution used was a metal screw through the support bar.