EPA proposes changes to engine emissions rules and penalties for 2027 and later models
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Table of Contents
The Environmental Protection Agency is proposing several changes to how heavy-duty engines are regulated starting in model year 2027. These changes involve adjusting the length of time an engine’s regulatory useful life and warranty periods must last, as well as correcting technical errors in existing regulations.
Why it matters: This is primarily a technical update to ensure that upcoming emission standards for heavy-duty engines have clear rules for warranties, penalties, and engine performance limits. It matters most to manufacturers of large diesel engines and the companies that operate them.
Who it affects
- Manufacturers of heavy-duty highway engines and medium-duty vehicles
This is a proposed rule from the EPA; readers should consult the Federal Register for the full text before relying on these changes.
Agency: Environmental Protection Agency
Source: Federal Register — read the official document