I believe the rattle is from the dash itself.....it seems there is a small gap between the dash and what the dash is attached to (or sitting on).....put your hand at the front of the dash(close to the windshield)and push down, you feel a little give to it. Mine rattles on rippled pavement and placing my hand there, stops it. I think using the loopside of some velcro placed under the dash in that area will quiet it down....just need to figure how to get the dash off.....if anyone knows the best way...chime right in please.

 

I found out that there just might be a simple fix to this, how many of you that have this rattle in the right side of the dashboard also have lugnut keys or anything of that nature in the glove box, i took my stuff out and it helped out quite a bit.

 

I have the same issue in a new 2005 coupe, and it shows up with certain rough road surfaces. But since I have the Shaker 1000 sound system, I don't get to hear it too often.

 

ME TOOOOOO>>>> My GOD!! I was thinking of pulling out the vents and wrapping something around it to make it fit tighter?/