Trump administration issues rule undermining Biden car fuel efficiency rules
- On June 6, 2025, the U.S. Department of Transportation declared that the Biden administration exceeded its authority in fuel economy rules by assuming high electric vehicle adoption.
- This declaration followed Transportation Secretary Sean Duffy's January order directing NHTSA to rescind Biden-era standards covering model years 2022 to 2031 due to legal concerns.
- The original rules, finalized in 2024, aimed to raise fuel economy about 2% yearly and required automakers to average roughly 50.4 miles per gallon by 2031 to reduce emissions.
- Senate Republicans proposed removing fines for not meeting these standards, while Chrysler and GM paid over $190 million and $128 million respectively in penalties for prior noncompliance.
- The DoT stated the revised rule enables NHTSA to adjust standards and supports vehicle affordability and consumer choice but may slow electric vehicle adoption and increase pollution.
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Transportation Chief Seeks to Weaken Fuel Economy Standards, Calls Biden-era Rule 'illegal'
Get latest articles and stories on World at LatestLY. Transportation Secretary Sean Duffy said in a rule Friday that Biden-era fuel economy standards for gas-powered cars and trucks were illegal and moved to reverse them, paving the way for a likely reset of rules. World News | Transportation Chief Seeks to Weaken Fuel Economy Standards, Calls Biden-era Rule 'illegal'.

Transportation chief seeks to weaken fuel economy standards, calls Biden-era rule ‘illegal’
Transportation Secretary Sean Duffy says Biden-era fuel economy standards for gas-guzzling cars and trucks are illegal and moved to reverse the rules.
Transportation chief seeks to weaken fuel economy standards, calls Biden-era rule 'illegal'
Transportation Secretary Sean Duffy said in a rule Friday that Biden-era fuel economy standards for gas-powered cars and trucks were illegal and moved to reverse them, paving the way for a likely reset of rules.Combined with Senate language in the pending budget bill to eliminate penalties for exceeding standards regulating how far vehicles must travel on a gallon of fuel, automakers moving forward could come under less pressure from regulators …
Transportation Department expected to declare Biden fuel economy rules exceeded authority
The Transportation Department is expected to declare that fuel economy rules issued under then-President Joe Biden exceeded the government's legal authority by including electric vehicles in setting the rules, automaker officials said Monday.
US Declares Biden Fuel Economy Rules Exceeded Legal Authority
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