That visor rattle on my Z went away after unclipping the left-hand side of visor from the mounting hardware. After its unclipped pull it back about a half to full inch such that it can't touch the mounting clip. Don't know if there is a TSB for a permanent fix but this works for now.

Sunsetman
Lemans Touring

 

...or just put a folded piece of paper in between the vanity mirror and lid. This stoped the rattle on mine.

 

Take your car to the dealer, and ask them to place shrink-tubing around each leg of the springs that open and shut the visor for the vanity mirror. This will take away the rattles. They should be able to make this modification in about a half hour, and worst-case, they'll break the mirror, and order a new visor for you, which is fixed from the factory. This is what I did to get the rattles out of both visors.

 

Thanks for the fix...unfortunetly I don't think the factory has this totally fixed. I had my visor replaced and it still rattles.