The 2026 mandatory review of the United States-Mexico-Canada Agreement is moving from procedural talks into active substance, and Mexico is using the window to push for lower auto tariffs inside the North American trade pact, the Wall Street Journal reported.

That is the top line from a WSJ dispatch carried by CBT News. Mexico's negotiators want tariff relief as USMCA talks intensify, but no specific tariff percentage, vehicle class, or implementation date has been put on the public record. Trade-press readers should treat the specifics as still-emerging.

Why does the auto sector watch every USMCA move?

USMCA governs cross-border movement of finished vehicles and major component sets between the United States, Mexico, and Canada. Its rules of origin — regional value content, steel and aluminum content, and labor value — define which vehicles move duty-free and which face the headline rate. The framework took effect in July 2020, replacing NAFTA, and includes a six-year mandatory joint review due in 2026.

USMCA's review window opens the door to tariff renegotiation, mechanism changes, and changes to rules of origin that govern how a vehicle qualifies for duty-free treatment. Mexico's team is signaling it wants the auto pillar addressed in this round.

Any change in auto tariffs touches every assembly plant in Mexico's automotive cluster and the landed cost of every imported unit. The current US headline tariff on passenger cars is 2.5%; light trucks carry a much higher rate inherited from the earlier "chicken tax" duties. Tariff give-back talks typically pair relief with procurement or content commitments.

What does the WSJ report actually say?

The WSJ dispatch confirms Mexico is pressing for a reduction. It does not identify which tariff lines Mexico is targeting, the size of the cut, the trade-offs Mexico is offering, or the negotiating format. In USMCA rounds, those specifics typically surface only in formal text or closed-door briefings, neither of which has been released for this cycle.

CBT News's summary does not include a direct quotation from a named Mexican or US official. Both economies ministries have declined to comment on the WSJ report since publication. The article's scope is the existence of the Mexican bid, not the parameters of it.

Which Mexican plants sit on either side of a tariff shift?

Mexico hosts a deep OEM and supplier footprint. Assembly plants cluster in Puebla, Guanajuato, Aguascalientes, San Luis Potosí, Coahuila, Nuevo León, Tamaulipas, Querétaro, Morelos, and Hidalgo — an industry that produces several million light vehicles a year. USMCA's rules of origin already shape sourcing across those facilities for both the Detroit Three and the Asian transplant base operating inside Mexico.

Any tariff cut would sharpen the cost line at those plants; any tariff hold would preserve the status quo. Industry executives have told trade-press in past rounds that stability matters more than headline rate — a stance Detroit-based OEMs and Asian transplant leadership are likely to hold through this cycle.

What to watch next

Three public markers will tell readers whether Mexico's push is gaining traction:

• A formal US negotiating position published by the Office of the US Trade Representative before the formal review opens.
• A Mexican economy ministry filing with a named tariff ask and the trade-off offered.
• An OEM response from the Detroit Three or the Asian transplant base, particularly on light trucks.

The next concrete step is the release of US trade negotiating language on automotive tariff lines, expected in the weeks ahead of formal USMCA review talks in 2026.