When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
You have to remove the main window to get the vent window out.
Remove the inner door skin and roll the window most but not all the way down.
Remove 2 screws on the forward leading edge of the vent window under the door seal and 1 below the vent window lock.
Pull the top of the vent window frame to the rear.
Reach into the door and slide the main window glass off the regulator arm, and remove from the door
Pull the seal from the main window channel attached to the vent window frame
Now turn the vent window frame 90 degrees and remove it from the door.