The Diesel Truck Liberation Act of 2025 would prohibit the federal government from enforcing laws requiring manufacturers, importers, and distributors to install or maintain emissions control devices on motor vehicles and engines. Specifically, it would prevent the Environmental Protection Agency from creating or enforcing regulations under the Clean Air Act related to emissions controls and onboard diagnostic systems. The bill would also eliminate all existing EPA regulations on this topic, shield manufacturers and individuals from criminal or civil penalties for selling or using vehicles without these devices, and vacate any criminal sentences and expunge records for past violations. No specific funding or timeline for implementation is mentioned in the legislation. The bill essentially eliminates federal authority to regulate vehicle emissions through emissions control technology requirements.
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