The roar of old engines began to fall silent on November 4, 2025, when the government of Claudia Sheinbaum Pardo announced a profound change in vehicle import regulations. During the event “Reception of the Agreement on Environmental Conditions for the Importation of Used Vehicles,” led by the Ministry of Economy, a plan was unveiled that seeks to modernize the national automotive fleet and reduce polluting emissions from land transportation. Does it affect unregistered vehicles?
The agreement was presented by Alicia Bárcena, head of the Ministry of Environment and Natural Resources (Semarnat), along with Marcelo Ebrard Casaubón, Secretary of Economy; Francisco Cervantes, president of the Business Coordinating Council (CCE); Miguel Ángel Martínez Millán, head of the National Chamber of Freight Transportation (Canacar); and Luis Hernández, director of Federal Motor Transport. According to Semarnat, this new regulatory framework prohibits the importation of diesel vehicles older than 10 years or that do not comply with the Euro VI and EPA 2027 international emissions standards, applied by countries with advanced regulations for pollutant control.
The objective is clear: to curb the entry of obsolete vehicles that negatively impact air quality and replace them with more efficient models. The National Emissions Inventory indicates that transportation accounts for 23% of the country’s greenhouse gas emissions, and although diesel vehicles represent less than 5% of the vehicle fleet, they generate 61% of particulate matter pollution in urban areas. In 97% of Mexican cities, PM2.5 levels exceed the limits permitted by the WHO.
President Sheinbaum has made sustainability a priority in her Mexico Plan, focused on decarbonizing transportation and transitioning to clean energy. Starting in January 2025, all new heavy-duty diesel vehicles must be equipped with DPF (Diesel Particulate Filter) filters capable of removing more than 95% of particulate matter, a requirement that aligns the country with international emissions standards.
The private sector, represented by the CCE (Business Coordinating Council) and Canacar (National Chamber of Freight Transportation), supported the initiative. According to Francisco Cervantes, the measure also strengthens the competitiveness of Mexican trucking by incentivizing the renewal of the vehicle fleet and improving fuel quality. During her remarks, Alicia Bárcena emphasized: “This is not about hindering development, but about breathing cleaner air and building a modern, clean, and fair economy,” a statement that summarizes the approach of the new regulatory model.
How does it affect unregistered vehicles?
Although the initiative is primarily aimed at imported heavy vehicles and diesel units, its impact extends to the debate surrounding so-called “unregistered vehicles,” that is, used vehicles brought into the country illegally from the United States, Canada, Asia, or Europe.
According to information from the Ministry of Economy, these vehicles enter the country without complying with tax and customs requirements, nor with the environmental protocols required by the Public Vehicle Registry (Repuve). For this reason, their regularization has been a priority for the federal government since the decree issued by Andrés Manuel López Obrador.
The new agreement doesn’t directly modify the current rules for legalizing unregistered vehicles, but it sets a precedent: going forward, only vehicles that meet emissions limits, have certificates of origin, and pass environmental verification tests will be eligible for legalization. This means that older vehicles or those with highly polluting diesel engines could be excluded from future legalization programs.
In practice, the measure promotes an automotive transformation process in Mexico, where the importation of used cars must align with a green agenda based on energy efficiency, emissions control, and vehicle safety.
With this policy, the government seeks to reduce dependence on unregistered vehicles and stimulate the formal market for electric and hybrid vehicles, moving toward sustainable mobility that combines technological innovation and environmental responsibility.
In the words of the official agreement, this is a change that redefines the boundary between importing and polluting: only vehicles that comply with the law—and with the planet—will have free passage into Mexico’s automotive future.
Source: debate
