Auto rental giant Hertz Corp. Thursday pleaded guilty to charges it defrauded customers and insurance companies of $13 million in repair costs and agreed to pay $13.7 million in fines and restitution, prosecutors said.

The penalty included a $6.85 million fine, the largest ever levied against a corporation in a criminal case, said Ann Driscoll, a spokeswoman for Brooklyn U.S. attorney Andrew Maloney.The remainder of the penalty comprises restitution to thousands of customers and insurance companies who the rental company admitted it systematically overcharged for repair costs on rental cars over a seven-year period beginning in 1978. No individuals were penalized.