For awhile I thought I had rattles in the seatbelt adjuster on the b-pillar (which I may still), but I realized the major source of rattle in my car was coming from the driver's and passenger side head rests. (The rattle would stop if I put my hand or head against the head rest.)

Any vibration on less than ideal surface, or when I hit a bump the head rests would rattle in place. The dealer told me the only thing they could do is replace it, and I decided I'd try and tackle it on my own.

While it's maybe not the best fix, I removed the head rests making note of which setting I use and place a strip of scotch tape on the lower part of the shaft. This was enough to give the head rest a tighter fit and not rattle. It's been about 6 mos. and the head rest rattle hasn't come back.

Just thought I'd share.

 

i some times hear the change that fell between the seats rattle....

 

maybe your seat rails?

 

bring it in for the dealer to check it out!..

 

Same here my passanger Headrest would rattle too but when i put my hand on it, would go away.