NOM-163-SEMARNAT-SCFI-2023: Light Duty Vehicles CO2 Emission Standards

The Official Mexican Standard NOM-163-SEMARNAT-SCFI-2023, published in Jan 2024 is the latest update to Mexico's standards on the carbon dioxide emissions from new motor vehicles with a gross vehicle weight of up to 3,857 kilograms. 

It covers vehicles that use gasoline, diesel or alternative fuels, or if they are hybrid, plug-in hybrid, electric, extended range electric or fuel cell vehicles. The latest standards increased the requirement of carbon dioxide emission level, including new credit lines and compensation mechanisms. Emission standards varies with the vehicle model year, being more stringent for the newer model year vehicles. 

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