when my music is blastiing in my car it makes a rattling noise sometimes.. from the back speakers by the window. i have a 2007 g35 coupe. does anyone know what the random rataling is. sometimes its there sometimes its not.

 

Probably the rear deck vibrating. There is a TSB for it in earlier models.

 

check the left or right rear seatbelt compartment thing.

mine rattles and i cant figure out how to stop it...