EPA sues Audi, Volkswagen, Porsche over clean air violations

The U.S. Department of Justice, on behalf of the U.S. Environmental Protection Agency, on Jan. 4, filed a civil complaint in federal court in Detroit against Volkswagen, Audi and Porsche.

The complaint alleges that nearly 600,000 diesel engine vehicles had illegal defeat devices installed that impair their emission control systems and cause emissions to exceed EPA’s standards, resulting in harmful air pollution...