You think the windows of our vehicles are simple to know about. You have the windshield and rear windows, right? However, there are more windows than you thought. Say you find that a tree branch has smashed the back window of your car and cracked the side window. You call an Auto Glass Replacement Company to see what it would cost to fix it, but they ask if the window that was broken on the side of your car was the back window, vent or quarter glass.

It’s always important to know the different types of auto glass on your vehicle so you can give more detailed information to auto glass technicians. Overall, there are 6 types of auto glass on a typical vehicle:

  • Front Windshield
  • Front and rear door auto glass
  • Vent glass
  • Quarter glass
  • Back glass


The windshield is your most important auto glass. Not only does it shield you from the wind as you are traveling but it provides up to 30% of the roof support.

Front Door/Rear Door Auto Glass

The front door auto glass and rear door glass can be different because of how they are tinted. In the state of Georgia, the windows to the right and left of the driver can not have tinting that reduces the light transmitted to less that 32% or light reflectance increased more than 20%.

Back Glass / Back Window

Back Glass always has the same restrictions concerning the grade of window tinting as the windshield, front and rear door auto glass.

Vent Glass & Quarter Glass

Vent and Quarter glass can be tricky just because they can be different sizes depending on the make and model of the vehicle.