Rattle in passenger seat?

Any ideas on how to fix a rattle, on the passenger seat of my 03 PreRunner 4 door 2wd. Rattle seems to be comming from a main round bar in the bottom of back support part of seat. Can only feel the bar, the seat covering is hidding the part. But I can get my fingers in and hold against bar to stop rattle. Just wondering if anyone else has ran across this problem. Thanks for any help.

 

No, but maybe some simple cable ties or something can tie it to another part to hold it still. Probably became loose and you would have to take out the seat to find the issue.