There’s not much about the rear door shades that would make them rattle. The material they’re made of is soft...and when retracted into the door...it’s rolled up on a tensioned spindle. The only thing that would possible make noise is the attached pull/handle (like against the top of the door). But there’s enough tension on the shade...the little pull handle should be held firmly down to prevent it from making noise.
The spindle itself should be attached to the innards of the door...so not sure how that would make rattling noises either.
