U.S. Opens Probe Into Manufacturing “Overcapacity,” Putting Mexico Under the Microscope
The Section 301 probe ramps up trade pressure on Mexico and could lead to measures affecting key exports such as autos and steel.
The United States government has launched a new round of trade investigations to determine whether various economies—Mexico among them—are promoting industrial models that create manufacturing “overcapacity” and distort global trade. Led by the Office of the United States Trade Representative (USTR), the process will be carried out under Section 301 of the Trade Act of 1974, a tool Washington uses when it believes certain foreign policies or practices are unjustifiable or restrictive to U.S. trade interests.
The investigation covers 16 economies, including China, the European Union, Japan, Korea, Vietnam, India, and Mexico. The core argument is that installed capacity in multiple industrial sectors worldwide has expanded faster than demand, pushing down international prices, increasing exports of surplus output, and fueling persistent imbalances. In this context, the United States—the world’s largest consumer market and a natural destination for a significant share of these flows—argues that the dynamic can discourage domestic productive investment and reduce the relative weight of U.S. manufacturing.
In its communication, the USTR cited data indicating global manufacturing capacity utilization of roughly 75% to 75.9%, below levels commonly associated with efficient operation in many industries (around 80%). Although the document relies on aggregate figures, the discussion unfolds amid intensifying industrial rivalry, greater use of trade-policy tools, and efforts to relocate supply chains—especially in sectors considered critical.
For Mexico, the probe arrives at a time when the economy remains heavily dependent on the U.S. industrial cycle: the country has cemented its role as an export platform, particularly in autos, auto parts, electrical equipment, electronics, machinery, and metal manufactures. The same productive integration that helps explain export momentum—and the boost to manufacturing employment in northern states and the Bajío—also makes Mexico more sensitive to regulatory, tariff, or rules-of-origin changes in its main market.
Mexico’s government, through the Ministry of Economy, has not put forward a substantive public position on the case at this stage. However, past trade disputes suggest that as hearings move forward, the issue will shift from the technical realm to the political: any measure that affects manufacturing flows would have direct implications for investment, supply chains, and growth expectations.
Autos, steel, and the weight of the bilateral surplus
In Mexico’s case, the USTR file highlights signs of excess capacity in export-oriented manufacturing sectors, with a particular focus on the auto industry and steelmaking. Washington also points to the size of Mexico’s goods trade surplus with the United States, which in 2025 stood—according to the document’s own narrative—at around $197 billion, with autos as the dominant driver.
Mexico’s auto industry has become one of the pillars of its export machine: the country ranks among the world’s largest vehicle producers and maintains a highly integrated footprint with U.S. plants and suppliers. According to figures cited in the investigation, Mexico’s automotive exports reached $104.8 billion in 2024, and nearly 80% of those shipments went to the U.S. market. That level of concentration—while efficient due to logistical proximity and specialization—also means any tightening of trade policy can quickly ripple through production levels, shifts, and new investment decisions.
On steel, the document points to a long-term expansion of installed capacity: between 2000 and 2019, capacity reportedly increased by 9 million metric tons (growth of roughly 46%). In practice, the sector is a recurring flashpoint because of its sensitivity to international prices, the presence of trade-remedy measures, and the debate over transshipment within North America—an issue that often escalates during election cycles or when industrial-policy strategies harden.
Beyond the sectors highlighted, the USTR also mentions signs of excess production in other manufacturing lines, including industrial processes tied to food and beverages. While these categories do not carry the same weight as autos or steel in the bilateral debate, their inclusion broadens the scope of concern and could raise questions about subsidies, tax incentives, financing, procurement policies, or support for certain production linkages.
The timeline for the process is already set: the USTR has opened a period to receive comments from companies, industry groups, and other interested parties through April 15, 2026, and plans to begin public hearings on May 5 in Washington. Based on that information, the United States will decide whether actionable practices exist under Section 301; if so, the range of responses includes trade measures such as tariffs.
From a macro perspective, an episode of heightened trade friction would add to challenges Mexico is already managing: a cyclical slowdown in North American manufacturing, cost pressures in certain inputs, the need for greater investment in electric and logistics infrastructure to sustain nearshoring, and financial conditions that remain restrictive even as markets expect gradual normalization. The main risk is not only the direct hit to exports, but the impact on investment decisions and on the perceived regulatory certainty for global firms operating in the country.
In broader terms, the investigation opens room for negotiation and a technical defense, but it also reflects a more active U.S. industrial and trade policy that is less tolerant of bilateral imbalances. For Mexico, the challenge will be to demonstrate the integrated nature of regional supply chains—where part of the exported value incorporates U.S. inputs—while also strengthening a domestic competitiveness agenda that reduces vulnerabilities to sudden shifts in market access.
In sum, the U.S. decision to investigate manufacturing “overcapacity” places Mexico under scrutiny that could escalate into trade measures. The outcome will depend on the evidence presented and the political climate, but the episode underscores the importance of diversifying risks, shoring up regional supply networks, and maintaining conditions that support productive investment.
