United States v. Cummins Inc. — Clean Air Act civil enforcement

Alleged conduct

Installation of defeat devices and undisclosed auxiliary emission control devices on engines certified for RAM heavy-duty pickup trucks.

Engines or vehicles affected

Approximately one million model-year 2013–2019 RAM 2500 and 3500 pickup trucks equipped with Cummins engines.

Manufacturer(s)

Cummins Inc.

Year

2024

Agency / court

U.S. Department of Justice / U.S. EPA

Vehicle class

medium-duty diesel

Historical relevance

Manufacturer enforcement matter from 2024. Kept separate from independent-tuner criminal defendants; the two enforcement tracks arise under the same Clean Air Act provisions but do not share defendants, penalties, or clemency records.

Relationship to independent tuner enforcement

This is a manufacturer / OEM matter. It is not part of the individual-tuner criminal docket set and no pardon of an individual tuner defendant affects it. Cross-linkage exists only through shared statutory authority (Clean Air Act §§ 203, 205, 213) and the underlying defeat-device theory.