When I turn up my music and has heavy bass, the rear near the trunk has a loud vibration like something is loose. Does anyone have this problem too? How did you fix it? It sounds like it comes from where the rear speakers are.

 

either adjust the bass or lower the volume

 

It's been reported before. I think the best solution is to add dynamat (or other dampening material) to the rear shelf (probably easier to do this from inside the trunk).

 

I have the same issue. I just haven't gotten around to pressing and nudging things around to try to find whats shaking.

 

if its a loud clanking sound than it is from where the center seat belt spools up,

 

I think that was the problem I encountered on my accord. I do remember stuffing something up there to quiet it down. I actually forgot I had this problem until you mentioned it

On my other accord, it was due to how the tinter just yanked out the rear shelf and damaged some of the mat

 

On mine it is a vibration and I can replicate it by hitting my fist against the top of the parcel shelf. If I get someone to put their hand on the parcel shelf frame part from the inside of the boot, the vibration goes away.

 

I guess maybe I can check around, figure out what the heck it is and then duct tape that sucker