Trump Administration Rolls Back Biden-Era Fuel Economy and EV Mandates

During the Biden administration, the federal government implemented strict fuel economy standards for new cars and light trucks. These rules aimed to accelerate the shift to electric vehicles and reduce greenhouse gas emissions. The standards included a mandate that required automakers to steadily increase the share of electric vehicles in their fleets. Industry groups and some politicians criticized these rules, arguing they were too aggressive and would drive up vehicle prices for American consumers.

On September 26, 2026, President Donald Trump announced that his administration would roll back the Biden-era fuel economy standards. He stated that the changes would eliminate what he called the 'EV mandate,' which required automakers to prioritize electric vehicles.

In the days following the announcement, several major outlets reported details of the new standards. The rules relax the requirements for average fuel efficiency, giving automakers more flexibility to produce gas-powered vehicles. According to government estimates, the average fuel economy target will drop from over 50 miles per gallon by 2031, as set by the previous administration, to about 34.9 miles per gallon under the new rules.

The Trump administration argued that the rollback would make cars more affordable and provide consumers with more choices. However, environmental groups and some experts warned that the changes could lead to higher fuel consumption and increased emissions in the coming years.

Automakers are expected to adjust their production plans in response to the new standards, potentially slowing the adoption of electric vehicles in the United States.

The new fuel economy standards are now in place, replacing the stricter requirements enacted under the Biden administration. Automakers can expect more lenient targets for both fuel efficiency and electric vehicle production in the coming years. The move has sparked debate between those who support more consumer choice and lower costs, and those who worry about the environmental impact of increased gasoline use. Federal agencies estimate that the new standards will lead to higher emissions compared to the previous rules.

Legal challenges from environmental groups or some states are possible, given the major change in federal policy. The auto industry's response, including shifts in production and marketing, will also become clearer in the months ahead as companies adjust to the new standards.