Mexico’s auto exports fell 12% in September from a year earlier, the steepest decline since December 2025 and the worst slump of the year, as tariffs continued squeezing production in the country’s biggest industrial sector. Monthly vehicle output dropped 15%. The statistics office INEGI released the figures Wednesday.
The numbers hit hard. Mexican vehicles still face U.S. tariffs of 25%, while government officials review the U.S.-Mexico-Canada free trade pact. Mexican officials estimate that carmakers meeting rules for North American-sourced parts cut the burden to between 10% and 12%. That remains a hefty toll for a business built around integrated cross-border supply chains.
Uncertainty Hits the Factory Floor
Analysts blamed U.S. tariff policy. Over more than three decades of successive free trade agreements, the two economies became closely intertwined. Sudden policy shifts and tariffs under the Trump administration have since shaken business owners’ trust in long-established supply chains.
“This has generated greater uncertainty for carmakers and it has affected production and export decisions,” said Janneth Quiroz, economic analysis director at Monex. She warned that Mexico’s reliance on the U.S. market poses the sector’s biggest risk.
Quiroz stopped short of sounding a full alarm. “The September data is a warning sign rather than a crisis signal,” she said. But she added a caveat: “If this trend continues into 2027, then we could indeed be talking about a more structural problem for Mexican manufacturing.”
Automakers Move Production Decisions
Companies aren’t waiting around. General Motors announced last year a $4 billion push to shift some production from Mexico to the United States as it navigates tariff policies. The Chevrolet-maker, Ford and Nissan all reported significant export declines in September.
Mercedes-Benz recorded a first. The German automaker shut a joint plant with Nissan last May and produced and exported no cars last month. It’s the first time that has happened since Mercedes began shipping abroad eight years ago.
Not every manufacturer lost ground. South Korea’s Kia, Germany’s BMW and Japan’s Mazda picked up some of the slack. Mazda more than doubled its monthly exports. Capital, it seems, keeps looking for the most favorable place to build.
A Cushion at Home, and Other Markets
Domestic sales rose 8% in September, helping soften the blow to the sector. Mexico’s main auto chamber, AMIA, said at a press conference Wednesday that Mexico remains the top foreign provider of cars in the United States, supplying 16% of light vehicles in a market that has shrunk 2% so far this year.
Still, AMIA data showed exports to the United States fell 5% in the first nine months of 2026. Canada, Mexico’s next-biggest market, increased its purchases by just over 9%, though that can’t replace the volume at stake across the northern border.
Alejandra Vargas, an analyst at Ve Por Mas, or Bx+, said a sustained slowdown could affect automakers’ investment decisions, Mexico’s manufacturing activity and overall economic growth. “The evolution of the trade relationship between Mexico and the United States will continue to be the main factor determining the industry’s course in the coming months,” she said.
Why This Matters:
Tariffs don’t just move prices. They move factories. A 12% drop in exports and a 15% fall in output show how quickly policy uncertainty reshapes decisions by firms that spent decades building cross-border supply chains. GM’s $4 billion shift of production toward the United States and Mercedes-Benz’s empty export ledger suggest companies are already hedging. For Mexico, dependence on a single market is a serious vulnerability, and analysts warn that if the slide runs into 2027, it could become structural. For American consumers and workers, the stakes are just as real, since integrated North American production has long kept vehicles competitive. The free trade pact review will test whether predictable rules or constant policy swings win out.