Federal Register #EPAHQ-OAR-2026-0728

EPA Proposed Rule: Amendments and Nonconformance Penalties for Model Year 2027+ Heavy-Duty Engines

This opportunity involves a proposed regulatory amendment by the United States Environmental Protection Agency (EPA) for model year 2027 and later heavy-duty highway engines. - Government Buyer: - United States Environmental Protection Agency (EPA) - Scope of Proposed Rule: - Regulatory amendments to compliance provisions and test procedures for heavy-duty highway engines - Changes to useful life periods and emission-related warranty periods - Revised inducement provisions for selective catalytic reduction (SCR) systems in diesel engines - Introduction of nonconformance penalties (NCPs) for medium and heavy heavy-duty engine manufacturers starting in model year 2027 - Allows continued sales of noncompliant engines under penalty while manufacturers develop compliant models - Replacement of engine performance derates with visible and/or audible notifications for SCR inducement - Affected Sectors: - Engine and vehicle manufacturers - Component suppliers - Related industries - Notable Requirements: - No specific OEMs or vendors named - No products or purchase quantities requested - This is a regulatory action, not a procurement opportunity

Description

The U.S. Environmental Protection Agency (EPA) is proposing regulatory amendments to compliance provisions and test procedures for model year 2027 and later heavy-duty highway engines. The amendments include changes to useful life periods, warranty periods, and provisions supporting heavy-duty engine programs. The proposal introduces nonconformance penalties for medium and heavy heavy-duty engines starting in model year 2027 and amends SCR system inducement provisions for diesel engines and vehicles. The rule aims to support the MY 2027 and later heavy-duty engine program, improve regulatory clarity, and introduce penalties for nonconformance.

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