U.S. files suit against Volkswagen over emissions scandal

The U.S. Department of Justice on Monday filed suit against Volkswagen AG, alleging it installed illegal emissions defeat devices in nearly 600,000 diesel-engine vehicles.

The civil complaint, filed on behalf of the Environmental Protection Agency, alleges the German auto maker VOW, -5.42% VLKAY, -2.82% violated the Clean Air Act by making and selling vehicles that were designed differently from what Volkswagen had stated in applications for certification to the EPA and another regulator, the California Air Resources Board.

A spokesperson for Volkswagen wasn't immediately available for comment.

The defeat devices impair vehicle emission-control systems, causing vehicles to exceed the EPA's standards.

The civil complaint civil complaint was filed federal court in Detroit against Volkswagen AG, Audi AG, Volkswagen Group of America Inc., Volkswagen Group of America Chattanooga Operations LLC, Porsche AG and Porsche Cars North America Inc.