25% Auto Parts Tariff Adds New Cost Pressure to Glass and ADAS Component Supply

Building on the March 4 tariffs, the White House issued a proclamation on March 26, 2025, establishing a 25% tariff on imported automobiles and automobile parts—a category broad enough to encompass OEM windshields, urethane adhesives, and ADAS sensor assemblies. A complementary April 2 executive order established a minimum 10% tariff on imports from all countries.

The automotive-parts tariff was designed to be additive to the country-specific tariffs already in place, meaning that glass imported from Mexico—subject to the 25% country tariff—and classified as an automotive part was not expected to be hit with both charges simultaneously. However, the complexity of tariff stacking required shops and distributors to work with their tax and legal advisors to understand their specific exposure, as the rules were subject to ongoing agency guidance.

The Center for Automotive Research projected that the automotive industry's total cost would increase by $107.7 billion as a result of the tariff complex. Of that, $43 billion was attributed to the raised cost of imported parts—a category that includes OEM glass. For shops ordering direct from OEM distributors, even a fraction of that cost increase could translate into hundreds of dollars per windshield on luxury or ADAS-heavy vehicles.

The tariff also had a secondary effect on calibration equipment. Tools for static ADAS calibration often incorporate imported electronic components, and price increases for those components—even modest ones—could delay the payback period on calibration investments that shops were already weighing carefully.

The White House also opened a comment process for adding additional automotive parts to the tariff schedule—meaning that parts not initially covered could be added later. Shops and distributors were advised to monitor the Federal Register and submit comments if specific glass-related products appeared on proposed tariff lists.

The broader impact of April 2025's tariff environment was a significant acceleration of pricing uncertainty throughout the supply chain. Distributors adjusted quotes more frequently; OEMs signaled that list prices could increase; and shops found it harder to give customers firm estimates on OEM-glass jobs without building in a contingency buffer.