OEM vs. Aftermarket Auto Glass: Making an Informed Choice
Understanding Your Options for Safe, Quality Auto Glass Replacement
When you need to replace your vehicle’s glass, you deserve straight talk to make an informed decision. At Ocean Auto Glass we carefully choose our glass suppliers based on quality standards.
OEM Auto Glass: What is Factory Glass
Original Equipment Manufacturer (OEM) auto glass is made by major glass manufacturers like AGC, Guardian, Saint-Gobain Sekurit, and Pilkington who win contracts to supply glass for specific vehicle models during production. These pieces have the vehicle manufacturer’s branding and are made to the vehicle manufacturer’s specifications.
Many of these major glass manufacturers also produce aftermarket glass, but not for every model they supply OEM glass for. The automotive glass industry is fluid, with manufacturers switching between OEM and aftermarket production based on contracts and market demand.
Aftermarket Auto Glass: The Common Option
Aftermarket auto glass comes from two sources: the same major manufacturers who produce OEM glass and independent manufacturers who specialize in aftermarket products. When major manufacturers don’t have the OEM contract for a particular vehicle model they may produce aftermarket instead.
While aftermarket glass must meet the same Department of Transportation (DOT) safety standards as OEM glass, there can be small differences in materials, processes and tolerances. These differences are often related to specific requirements set by vehicle manufacturers for their OEM contracts. At Ocean Auto Glass we only work with top tier manufacturers who are known for their quality and precision.
What are the Key Differences
All auto glass sold in the United States must meet Federal Motor Vehicle Safety Standards (FMVSS) testing requirements, so there’s a minimum of safety regardless of origin.
Quality and Safety Standards
Manufacturing and Standards: OEM glass is made by contract manufacturers to vehicle manufacturer specs. Aftermarket glass meets DOT safety requirements but may have different tolerances or materials. Both are tested to federal standards.
Why Aftermarket Glass is Popular
Insurance companies and auto glass professionals choose aftermarket glass for several reasons:
- Safety Compliance: Meets federal requirements
- Better Inventory: More options in stock
- Cost Savings: Big savings while meeting safety standards
- Market Competition: Multiple manufacturers means competitive pricing
ADAS Compatibility and Calibration
Modern vehicles have Advanced Driver Assistance Systems (ADAS) that use cameras and sensors embedded in or mounted on the windshield. These systems include lane departure warnings, automatic emergency braking and adaptive cruise control.
Safety Alert
ADAS calibration is required after any windshield replacement, regardless of glass type.
Frequently Asked Questions
All auto glass sold in the US must meet DOT safety standards. While there may be subtle differences in materials or tolerances, both types must pass the same safety requirements.
No. The Magnuson-Moss Warranty Act protects your right to use aftermarket parts without impacting your warranty or lease agreement.
Insurance providers primarily choose aftermarket glass for its cost-effectiveness while still meeting safety requirements.
If your vehicle features any advanced driver assistance systems (lane departure warning, adaptive cruise control, etc.), calibration is essential after windshield replacement.