United States v. Detroit Diesel Corporation — Clean Air Act civil settlement

Alleged conduct

Alleged introduction into commerce of model-year 2010 heavy-duty diesel engines that were not covered by valid EPA certificates of conformity for the model year.

Engines or vehicles affected

Approximately 7,700 model-year 2010 heavy-duty diesel engines sold after applicable NOx standards took effect.

Manufacturer(s)

Detroit Diesel Corporation

Year

2017

Agency / court

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

Vehicle class

heavy-duty diesel

Historical relevance

Manufacturer enforcement matter from 2017. 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.