(Sorry for my bad English)
the past month I have noticed a metallic sound ( same type of nice as a loose metallic plate does)
On driverside you can hear it from behind you and to the passenger it

 

I have it too. It is coming from under the deck and behind the seats. I've had that whole thing apart and when you bump the roll bar, I could still hear it. I gave up after an hour of searching. I'll go at it again when I install my amp.

 

Me too. Just started noticing it about a week ago. Hear it when I am going around turns in particular. Anyone with thoughts or suggestions is greatly appreciated.

 

I've heard it twice. On the very first day that I had the car and a few weeks ago. Both times it happened mid-turn. This is in 2600 miles of driving -- some of it very hard. I haven't been able to "make" it do it. It just has happened! Maybe it had to do with the camber of the road . . . .