Different Types of Auto Glass

Know what is in your vehicle

Your windshield and windows may look similar, but their construction can be different. Most everyday passenger vehicles use laminated and tempered safety glass. Knowing the difference helps explain why one piece may crack and stay together while another breaks into many small pieces.

The correct glass depends on the vehicle and the window being replaced. Here’s a simple guide for San Antonio drivers.

Technician holding a replacement windshield above a car using suction handles.
Windshield replacement starts with the correct glass for the vehicle.

Laminated glass

  • Laminated glass has two layers of glass bonded to a plastic layer between them.
  • That middle layer helps hold broken fragments together when the glass cracks.
  • It is commonly used for front windshields and is also found in some side and rear windows.

Holding fragments together can reduce the risk of flying glass, but laminated glass can still break and cause injury.

A cracked windshield that remains in place still needs an assessment. Its appearance alone cannot tell you whether it is safe to use or suitable for repair.

Split image for comparison of damaged and repaired driver side left front laminated door glass on a van in Marion, Texas.
Laminated door glass is used on some vehicles. These job photos show a door-glass replacement.

Tempered glass

  • Tempered glass is heat-treated and rapidly cooled to increase its strength.
  • When it breaks, it typically separates into many small pieces rather than the long, sharp shards associated with ordinary untreated glass.

Many vehicles use tempered glass in side windows and back glass.

Those smaller pieces can still cause injury, so avoid touching or brushing broken glass with bare hands. A shattered pane also leaves an opening that needs attention.

Open vehicle door with its side-window glass broken into many small fragments.
A broken door-window example. Appearance alone does not establish the original glass specification.

Which type does my vehicle use?

  • Front windshields generally use laminated glass.
  • Side windows and back glass vary by vehicle, model year, and equipment.
  • Some vehicles have laminated front door glass even when other windows are tempered.

“Door glass,” “vent glass,” “quarter glass,” and “back glass” describe where a piece fits. They do not, by themselves, confirm how it is made. Check the specific vehicle and part before choosing a replacement.

See our windshield services or car window replacement information for help with the affected area.

Matching the replacement to your vehicle

  • A replacement needs to match the vehicle’s original glass specifications and applicable manufacturer requirements.
  • Shape and size are only part of that match.
  • Features such as a head-up display can require a specific windshield.

When requesting a quote, include:

  • Your year, make and model
  • Which window is affected
  • A description of the damage

For a windshield replacement: have your VIN available to help identify the right part.

Glass features can change the replacement part

Laminated and tempered describe construction. Other names describe features built into the glass. A vehicle can have laminated glass with several additional features at the same time.

  • Acoustic glass: a sound-damping interlayer helps reduce noise entering the cabin. It is a glass specification worth matching when a replacement is selected.
  • Head-up display glass: a windshield designed for a head-up display helps the projected information appear correctly. Tell the provider if you see speed or navigation information projected onto the windshield.
  • Solar-control glass: coatings, tint or interlayers can help manage sunlight and heat. Glass that looks similar may have different built-in properties.
  • Heated glass: wires or conductive coatings can help clear frost and fog. Describe the heating feature rather than assuming every windshield for the model includes it.
  • Camera, sensor and antenna features: the glass may need specific brackets, viewing areas or integrated components. Matching the outline of the window is only one part of selecting it.

See Pilkington’s automotive glass features

What do OEM and OEE mean?

OEM stands for original equipment manufacturer. If a quote uses that term, ask whether it specifies the vehicle maker’s genuine replacement part and request the glass manufacturer and part number.

OEE stands for original equipment equivalent and is used for some aftermarket replacement glass. The name alone does not establish that a particular part meets every vehicle-maker requirement. For example, Stellantis distinguishes glass marketed as OEE from genuine Mopar glass in its replacement guidance. Ask which part is proposed, which options it includes and how it meets the requirements for your vehicle.

Read Mopar’s glass replacement guidance

What the markings can tell you

  • The small permanent markings on a window can help identify its manufacturer and glazing information.
  • The DOT manufacturer code identifies the glass manufacturer; it is not a complete list of the vehicle’s options.
  • A clear photo of the markings can help the provider investigate the existing glass alongside the VIN and equipment details.

NHTSA explains glazing manufacturer identification

Need help identifying the correct part?

Use the Quick Quote Form or call 210-793-7115.

Explore types of glass damage and our windshield sensors guide.

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Your questions answered

FAQ’s

Laminated glass has glass layers bonded around a plastic interlayer that helps hold fragments together after a break. Tempered glass is heat-treated and typically breaks into many smaller pieces. Both can cause injury when damaged. The correct construction depends on the specific vehicle and window.

No. Many side and rear windows use tempered glass, but some vehicles use laminated glass in those positions. The window’s location or appearance alone does not confirm its construction. Have the provider check the vehicle, existing glass markings and replacement-part information.

No. The interlayer helps retain fragments, but laminated glass can still crack, break and cause injury. A cracked windshield that remains in place still needs an assessment; that appearance does not establish whether it is safe to use or suitable for repair.

Do not choose a different construction simply because it fits or costs less. The replacement should follow the vehicle’s original specifications and applicable manufacturer requirements. Ask the provider to confirm the correct part for that particular window and vehicle.

Acoustic glass uses a sound-damping interlayer to help reduce noise entering the cabin. It is an additional glass feature, not a separate window location. Tell the provider if the vehicle has acoustic glass so that specification can be considered when selecting the replacement.

A head-up display can require a windshield designed for the projected image. Mention it when requesting a quote, even if two candidate windshields look alike. The provider should verify the correct HUD-compatible part and the vehicle maker’s requirements.

Mention windshield cameras, rain sensors, heating, a head-up display, antennas and any known acoustic or solar-control features. These may affect the glass, brackets, connections or viewing areas required. The year, make and model are a starting point; equipment and VIN information help identify the correct option.

No label alone establishes that. OEM means original equipment manufacturer; OEE means original equipment equivalent and is used for some aftermarket glass. Ask for the proposed manufacturer and part number, which features it includes, and how it meets your vehicle maker’s applicable replacement requirements.

The permanent markings can help identify the glass manufacturer and glazing information. The DOT manufacturer code identifies the manufacturer, but it is not a complete list of vehicle options. A clear photo of those markings can help the provider research the part alongside the VIN and equipment details.

Use the Quick Quote Form with your contact details, service location, vehicle year, make and model, affected window and a description of the damage. For windshield replacement, include the VIN and known glass or camera features. Photos can help start the assessment; they do not replace an inspection.

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Split image for comparison of damaged and repaired driver side left front laminated door glass on a van in Marion, Texas.
Illustration of a white SUV with a clear windshield and side windows.

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