The 2026 joint review of the United States-Mexico-Canada Agreement will reshape the operating environment for North American vehicle and parts production, according to a new analysis from the Brookings Institution.

Titled "Challenges and opportunities for the North American auto industry in the 2026 USMCA renegotiation," the analysis frames the scheduled review as the next structural test for the region's automakers and parts suppliers. Brookings positions the paper as a planning brief for an industry whose plant and supplier decisions made today will land inside the post-2026 regime.

The USMCA, which took effect July 1, 2020, carries a six-year built-in review clause that brings the three governments back to the table in 2026. That timing is not abstract for manufacturers: regional value content rules, wage thresholds, and rules-of-origin calculations are already baked into multi-year sourcing contracts and capacity expansions announced since 2020.

What is at stake for OEMs?

For OEMs, the question is whether the existing rules — including the 75% regional value content threshold and the labor value content requirement that steps up to 40% by 2026 — remain intact, tighten further, or relax. Brookings frames the review as a window in which each scenario carries distinct implications for plant footprints in Mexico, the U.S. Midwest and South, and Canadian assembly operations.

Where are the plant-level exposures concentrated?

• Mexico. The country has been the fastest-growing leg of the North American production base, with multiple OEMs and battery suppliers announcing new capacity in recent years. Any change to USMCA treatment of EV content, battery cells, or steel and aluminum sourcing would ripple through those programs.
• Canada. Ontario-based parts production — machining, stamping, and powertrain components — relies on the agreement's regional value content rules to qualify output as North American. A change in those calculations would directly affect supplier cost positions.
• United States. Domestic content requirements, IRA-aligned battery sourcing rules, and labor standards tied to incentive eligibility are now layered on top of USMCA rules, creating a regulatory matrix that automakers must reconcile as they plan capacity through 2030.

Why does Brookings call 2026 a pivot point?

The 2026 review lands in the middle of a major EV and battery capacity build-out across all three countries. Capacity decisions announced in 2023, 2024, and 2025 are being made under the existing USMCA framework, but the plants and lines those announcements fund will operate for decades under whatever terms emerge from the review.

Brookings describes the review as a moment when industry, labor, and government positions will collide — and when the choices made in Washington, Ottawa, and Mexico City will determine which OEMs and suppliers hold cost advantage through the end of the decade.

What to watch next

• The formal launch of the 2026 USMCA review process and the first official position papers from the Office of the U.S. Trade Representative, Global Affairs Canada, and Mexico's Secretaría de Economía.
• Any OEM or Tier 1 supplier announcement that explicitly hedges against renegotiation outcomes — including pauses, scope reductions, or relocations tied to content-rule uncertainty.
• The next major capacity milestone: U.S. and Mexican battery cell plants scheduled to come online in 2025 and 2026, which will serve as the first stress test of USMCA EV provisions before the formal review begins.