Windows Rattling and Scraping on Toyota Supra

The windows on the MKIV Toyota Supra commonly lean in towards the cabin when they are rolled down, and a metal-on-glass rattle is heard with any vibration. As the problem advances, popping may be heard from the door as the window rolls up or down.

This issue is caused by a failing window regulator which no longer holds the window upright, and places undue strain on pads that prevent the window from contacting the metal door frame. After a short time, the pads inside the door wear out, allowing the window to rattle and become scratched.

To correct the rattling and popping noises, the window regulator and pads must be replaced.