USMCA Review Casts Shadow on Auto Supply Chains

The United States-Mexico-Canada Agreement (USMCA) is set for a critical review in July, a step required under the pact’s built-in sunset mechanisms. The process requires the three countries to affirm that the agreement will continue, and the outcome could introduce fresh uncertainty for North American automotive manufacturers.

Officials and industry participants have flagged that the review could lead to meaningful changes in trade rules. Any shift would have implications for supply chains, investment strategies, and decisions about where factories are located across the region.

How USMCA reshaped auto rules since 2020

USMCA took effect in 2020, replacing the North American Free Trade Agreement (NAFTA) with updated provisions that were especially consequential for the automotive sector. The agreement set a 75 percent regional content requirement for vehicles and parts.

It also introduced a 40–45 percent Labor Value Content (LVC) threshold and included mandates tied to North American-sourced steel and aluminum. These provisions have been central to how manufacturers plan production and sourcing across the United States, Mexico, and Canada.

Trade flows and measured macro effects

Since USMCA’s implementation, U.S. imports of Mexican vehicles and parts rose from $196 billion in 2019 to $274 billion in 2024. Over the same period, the combined U.S. trade deficit with Mexico and Canada exceeded $250 billion by 2025.

Despite the scale of cross-border trade, the macroeconomic impacts on GDP have been described as minimal, remaining below 0.01 percent. The review therefore arrives with large sector-level stakes even as broad GDP effects have been limited in the available figures.

Possible outcomes and operational risks

Three scenarios have been outlined for what could follow the July review. One is a renewal of the agreement with targeted modifications.

A second is a shift toward separate bilateral arrangements if a trilateral consensus cannot be reached. A third is a complete reversion to pre-NAFTA conditions, which would involve elevated tariffs.

Stakeholders have also warned that failing to reach a defined outcome could raise capital costs, slow localization decisions, and force supply-chain reorganization for U.S. industries. For automakers, uncertainty around rules of origin and sourcing requirements can affect long-lead investment choices tied to plants, tooling, and supplier contracts.

Steps companies are being urged to consider

Automotive manufacturers have been advised to take preparatory steps to reduce disruption risk. Suggested actions include adjusting production footprints, strengthening U.S. hubs, building inventory buffers, and investing in dual sourcing.

The July review is expected to be a key moment for the region’s trade framework, with outcomes that could influence how North American vehicle and parts production is structured under USMCA going forward.