Access a Door rattle 2016 Tacoma

Have a rattling noise inside the access door behind drivers seat. Seems to be getting worse. Any suggestions what it might me. I have tried the inside door handle which works fine but rattling seems to be coming from just below that area. It’s a 2016 Tacoma

 

Are you sure it isn't in the passenger-side access door as well. I noticed a rattle introduced after the seatbelt pretensioner recall D0L in 2011 that is still audible in my 3rd gen.

If the rattle is unique to the driver side, then the only way to know is to open up the inside bra door panel and have a look:

 

Thanks. What I thought. It seems to be unique to drivers side access door