March 19, 2026
On February 5, 2026, General Motors LLC initiated Investigation 337-TA-1491 with the U.S. International Trade Commission, alleging design patent infringement on vehicle parts and components. The USITC formally instituted the probe on March 10, naming 20 respondents in the collision and chassis parts space — a roster heavily weighted toward Taiwan’s aftermarket industry.
The stakes are immediate: Section 337 investigations can result in import exclusion orders, effectively banning respondents’ products from entering the U.S. market. For the aftermarket sector, where Taiwan suppliers anchor the supply chain, this is an existential threat.
The Broader Context: OEM Strategy Shifts Into High Gear
This patent probe is not happening in a vacuum. It arrives just days after Ohio legislators advanced the “Auto Insurance Transparency Act,” a bill designed to mandate OEM parts for collision repairs — legislation that aligns perfectly with GM’s commercial interests. Earlier this month, the same ecosystem that struggles with ADAS recalibration costs is now facing the prospect of losing cost-competitive aftermarket alternatives.
What is clear: automakers are using every tool in their arsenal — patent law, regulatory lobbying, design mandates — to lock consumers, insurers, and repair shops into OEM parts dependency.
Why Design Patents and Aftermarket Parts Don’t Mix
Design patents protect the ornamental appearance of a product, not its functionality. In the collision repair world, this protection often extends to parts like hoods, fenders, bumper covers, and lighting elements. The challenge for aftermarket manufacturers is that even minor visual differences — a slightly different contour, a repositioned logo mount — can trigger infringement claims.
Taiwan’s aftermarket suppliers have built a business model on reverse-engineering OEM designs with cost savings of 30-50%. That efficiency is now in GM’s crosshairs.
What Happens Next
The USITC investigation will run roughly 16-18 months, with respondents filing their responses and evidence over the coming weeks. A settlement between GM and respondents is possible and common in Section 337 cases. However, if the USITC finds infringement, exclusion orders could begin taking effect by late 2027, fragmenting the supply chain and raising collision repair costs for consumers and shops alike.
For the aftermarket collision parts industry — already under pressure from ADAS complexity and OEM legislative campaigns — this represents a coordinated squeeze on market viability.
The Bottom Line
This is not simply a patent dispute. It is a strategic weaponization of trade law to defend OEM parts pricing and exclude competition. Consumers and independent repair shops should be watching closely.
