Trump says he is rolling back Biden-era US fuel economy rules for cars

The US president said he would end a so-called ‘EV mandate’ that steered consumers to electric vehicles.

United States President Donald Trump has announced new fuel economy standards that roll back requirements adopted under his predecessor, arguing they will lower automobile prices and encourage manufacturers to expand production in the US.

In a social media post on Saturday, Trump said the new standards would “TERMINATE” what he called former US President Joe Biden’s “EV (electric vehicle) mandate”, accusing the previous administration of imposing costly requirements on carmakers and steering consumers towards electric vehicles.

“These new Standards will take the waste out of building cars in America. That means LOWER PRICES, saving families thousands on a new, beautiful, and safe car,” Trump wrote.

The changes form part of a broader Trump administration effort to reverse Biden-era policies supporting lower-emission vehicles, increasing the gap between US policy and global trends favouring electric vehicles.

While Trump and US Republicans have used the term “EV mandate” to describe higher fuel efficiency requirements instituted under Biden, a Democrat, there are no federal guidelines or laws that require Americans to buy electric cars or bar the sale of ones powered by petrol.

At the centre are Corporate Average Fuel Economy (CAFE) standards. This system, established by the US Congress in 1975, requires automakers to meet average fuel economy targets across all cars and light trucks they sell, meaning that a brand that sells an inefficient vehicle would also have to sell a more efficient one to help comply with the government’s standards.

Under rules finalised by the Biden administration in 2024, the required fleetwide fuel economy was scheduled to rise from 39.1 miles per gallon (mpg) to about 50.4mpg by 2031. The administration said then the measures would reduce fuel consumption and emissions to combat climate change while helping motorists save money at the pump.

As a result, auto manufacturers have ramped up production of EVs to help meet the Biden-imposed fuel economy requirements. The Republican-controlled US Congress, however, gutted consumer tax incentives last year for electric vehicles as part of Trump’s One Big Beautiful Bill Act.

Trump did not provide details regarding what the new fuel economy standards would be. But in December 2025, he announced a proposal that would set the industry fleetwide average for light-duty vehicles at roughly 34.5mpg by 2031, more than 30 percent lower than the Biden-era rule.

In a reposting of Trump’s announcement, US Transportation Secretary Sean Duffy said an announcement would be “COMING MONDAY”.

Al Jazeera has reached out to the White House for comment.