A federal judge fined FCA US $30 million on Tuesday after the automaker admitted that it paid off United Auto Workers leaders to try to win concessions in negotiations covering thousands of factory workers.

U.S. District Court Judge Paul Borman also sentenced FCA US to three years’ probation and ordered an independent compliance monitor.

FCA stands for Fiat Chrysler Automobiles, now part of Stellantis, which was created by the Fiat Chrysler and PSA Peugeot merger.

The automaker pleaded guilty in March to conspiracy. Its conviction follows a series of guilty pleas from UAW officials who were showered with more than $3.5 million in cash and items over an 8-year period. “There is a need for this sentence imposed to reflect the seriousness of the offense, promote respect for the law and provide just-punishment for the offense to adequately deter criminal conduct from any other corporations or executives of corporations considering such criminality,” Borman said.