Nissan, which swiftly removed Ghosn as chairman days after his first arrest, is seeking to turn over a tumultuous chapter in its ties with Renault. Nissan has long rebuffed overtures for a full merger, and the detention of the former global auto titan threatened to derail their partnership, the world's biggest auto alliance. Since then, Nissan has won more autonomy under a new governance structure, led by Renault Chairman Jean-Dominique Senard, designed for smoother and more equitable decision-making.