Mexico has raised concerns that a US trade pact unfairly tilts toward South Korea, warning the tariff gap could push auto production out of North America and threaten jobs and investment. Mexican officials argue the deal’s structure gives Korean manufacturers an edge over Mexican exporters under the same agreement.
The tariff disparity at issue
At the heart of Mexico’s complaint is a difference in tariff rates applied to goods from the two countries. Mexican authorities claim the US trade pact allows South Korean products to enter with lower tariffs than those imposed on comparable Mexican goods. That disparity, they say, creates an incentive for companies to move production from Mexico to South Korea — or to source components from Korea instead of North American suppliers.
Mexico hasn't provided a full breakdown of the tariff gaps, but officials have pointed to the automotive sector as the most exposed. The country’s auto industry, which supplies parts and finished vehicles to the US market, relies heavily on the preferential tariff treatment that the trade pact was supposed to guarantee. If that advantage erodes, Mexican plants could lose orders to Korean rivals.
Impact on North American auto sector
Auto jobs and investment in North America hang in the balance, according to the Mexican government. The concern is that even a slight tariff advantage for South Korea could tip the cost calculus for automakers and parts suppliers. Production shifts away from the region would mean fewer jobs in assembly plants and supply chains that stretch across the US, Mexico, and Canada.
Mexico didn't offer specific job or investment figures in its complaint. But the country is a major hub for carmaking — dozens of plants operated by global automakers employ hundreds of thousands of workers. Any move to reduce output there would ripple through the broader North American economy.
Complicating US-Mexico trade dynamics
The complaint arrives at a delicate moment for US-Mexico relations. The two countries share a deeply integrated supply chain, especially in autos, and both are parties to the USMCA — the regional trade pact that replaced NAFTA. Having Mexico publicly question the fairness of a US trade deal with an Asian competitor adds a new layer of tension.
Mexico's stance suggests it sees the pact as violating the spirit of regional integration that the USMCA was meant to preserve. If the tariff disparity isn't addressed, Mexican officials worry that North America's collective competitiveness will weaken relative to South Korea. They've asked the US to re-examine the terms or offer compensating adjustments.
The US hasn't responded publicly. The next steps could involve bilateral talks or a formal dispute process under the trade agreement. For now, the question is whether Washington moves to close the gap — or leaves Mexico to compete with one hand tied behind its back.
