I do not know if anyone else has this problem or not but something is causing a squeaking/chirping noise from my back seat and I cannot locate the problem. It appears to be coming from the passenger side back seat and if I hit the backrest with my hand u can hear it but when the seat is down its not there.
The most annoying thing is it does this when I am driving and any slight bump make sit squeak. The sound is almost like a cricket and the bumpier it gets the more chirping I get.
I do have subwoofers installed behind the seat but that box is custom and is in their tight and there is no give in it at all to have it be the cause. I think it is something inside the backrest but I have no clue.