Fixed Vibration / Rattle in Rear Interior Area

[Sheriff]

Ever since I pruchased my used '06 (mid December), I noticed an annoying rattle coming form the rear interior area. It only occured after the engine has warmed up a little and at idle (slightly lower RPM after warm-up). Did a lot of searches here and other locations, but nothing came up that was similar to my situation.

Yesterday, I installed my new Magnaflow exhaust and during the process had the H3 idling (enjoying the new exhaust sound ) and heard the rattle, so the search was on. After a little time I realized it was coming from the jack storage area. However, nothing that I did to tighten the jack (even shoving towels around it) would eliminate the vibration noise.

I was just about to give up when I closed the back door and went around to the drivers seat and noticed the sound was gone!! I went back and opened the door and noticed that I had left the plastic cover off by accident. I put the plastic cover back on, closed the door, and sure enough the rattle was back. It is hard to believe that such a lightweight cover would cause that much noise, but when I added a little rubber padding around the edges and re-installed the cover, the noise was eliminated!

Thought I would share this in case anyone has a mysterious noise they can't find. Maybe this is unique to my H3, but who knows, this might help someone in the future!!