Leaders of the scandal-hit global auto alliance between Nissan Motor Co., Renault SA and Mitsubishi Motors Corp. said Tuesday they will strive for a balanced and stronger partnership to excel against rival carmakers.

In an apparent effort to outline the structure of the post-Carlos Ghosn alliance, the three companies said the entity will establish a new joint management board designed to be operated with a fair balance of power.

"This is a very special day for the alliance," Renault Chairman Jean-Dominique Senard said during a news conference at Nissan's headquarters in Yokohama.