On March 10, 2026, the US International Trade Commission (USITC) announced the launch of a Section 337 investigation targeting 20 automotive parts manufacturers across Taiwan, China, and the US. The probe follows a lawsuit filed by General Motors (GM) and includes 10 leading Taiwanese aftermarket (AM) suppliers such as Tong Yang Industry, DEPO Auto Parts, and Gordon Auto Body Parts. This unexpected patent litigation has come as a shock to Taiwan’s automotive collision parts exporters, and also signals a shifting competitive landscape in the global automotive supply chain.