On automobiles, quarter windows are located either on the front door of the vehicle or in front of the rear window. In either case, the window is usually located on the side of the car, although it may also be set in the corner. However, only some cars have these windows.

Quarter window is as well at times called quarter glass. This casement might be set on center and would then be called a vent window. Mainly and frequently can be found on older automobile on the frontage entry, a tiny and more or less triangularly fashioned tumbler in obverse of and detached from the focal window that roll downward.

When Ford switched from the '86 model year to the '87 model year, they decided to go with a cleaner-looking rear quarter window assembly for the Mustang. The window glasses were embedded in a one-piece assembly that was made with vulcanized rubber. The assembly was complex, but it blended the roof into the rear quarter-panel. However, as time passed, the rubber deteriorated in the hot sun and left a discolored and pitted window frame.

It is unfortunate that the "quarter windows" on Mustangs have begun to deteriorate, and are rather expensive to replace properly. Some owners have moved to drastic measures such as paint and patch kits, but these only work for brief periods of time.

Late model Restoration Supply has stepped up to the plate with the ultimate solution: brand-new '87-'93 rear quarter windows for mustangs manufactured by an original-equipment manufacturer. Priced at $599.95 per pair and available for both hatchbacks and hardtops, the windows are identical to the original Ford assemblies, right down to the Mustang lettering on the glass.

Replacing the rear mustang quarter windows is a fundamental R&R process. Getting to those nine retaining nuts for every ford mustang window is the toughest aspect; essentially, for hatchbacks, you must take off all the plastic trim in the rear of the interior. However, mostly you will deal with small Phillips head screws, though you will need the right socket to unbolt the front seatbelt mechanism on either side of the vehicle.