had the same problem with 3 windows. go to autozone, theres a section i think with some window parts, get anything that basically looks like a screw/clip and a bracket for it to go into. take the door panel off, slice open the rubber lining. move the window till you get a good angle on it so you can grab it, reach in and replace the clip. honestly, it doesnt really matter much what it is, just needs to be sturdy enough to support the window. tighten it up, put the door back on, and enjoy having an extra $1000 bucks in your bank.