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119-s-3007119th CongressWALLET

Diesel Truck Liberation Act of 2025

Sponsored By: Senator Lummis, Cynthia M. [R-WY]

Introduced

Summary

A blanket ban on federal requirements for emissions control devices and onboard diagnostic systems. The bill would nullify federal requirements and related enforcement for those systems across motor vehicles and engines.

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  • Manufacturers, importers, and distributors would not be required to install, certify, or maintain emissions control devices or onboard diagnostic systems on motor vehicles or engines.
  • No person or entity would face federal civil or criminal liability for making, selling, importing, buying, using, or modifying a vehicle or engine that lacks these devices, and criminal penalties could be vacated with related records expunged.
  • Federal regulations related to the installation, modification, or removal of these devices under the Clean Air Act or other federal law would be nullified and have no force.

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Bill Overview

Analyzed Economic Effects

2 provisions identified: 1 benefits, 0 costs, 1 mixed.

Ban on federal vehicle emissions rules

If enacted, this bill would bar any Federal law from requiring emissions control devices or onboard diagnostic systems on motor vehicles or engines. It would stop the EPA from making or enforcing any such requirements under the Clean Air Act or other federal laws. It would remove federal civil and criminal liability for making, selling, importing, buying, using, or modifying vehicles or engines that lack those devices. It would cancel related federal regulations and take effect upon enactment. If enacted, this could lower compliance costs for manufacturers and some owners but could raise air pollution and health risks for many communities.

Clear records for emissions offenses

If enacted, this bill would vacate jail sentences for people convicted for installing, removing, selling, or using vehicles without emissions controls. It would erase any record of related criminal or civil findings. The relief would apply to past conduct covered by the bill. This would take effect upon enactment.

Sponsors & CoSponsors

Sponsor

Lummis, Cynthia M. [R-WY]

WY • R

Cosponsors

  • Sen. Sullivan, Dan [R-AK]

    AK • R

    Sponsored 11/4/2025

  • Sen. Ricketts, Pete [R-NE]

    NE • R

    Sponsored 3/3/2026

Roll Call Votes

No roll call votes available for this bill.

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