A Japanese automotive parts supplier has agreed to pay $6 million to resolve claims of price-fixing and bid rigging in the first civil settlements in a sweeping antitrust case coordinated in federal court in Detroit.

The U.S. Justice Department has targeted auto parts suppliers with the largest antitrust investigation in its history. So far, 23 companies and 25 executives have been charged. Many of them have pleaded guilty and the Justice Department has obtained $1.8 billion in fines.