Nissan chief executive Hiroto Saikawa will step down because of a scandal involving inflated stock-linked bonuses, thus deepening the turmoil that has enveloped the Japanese carmaker since the arrest of former chairman Carlos Ghosn.

Ma Jie and Kae Inoue Carlos Ghosn’s arrest is triggering a reckoning at the Japanese carmaker he once saved from near bankruptcy, with Nissan reviewing its global operations and relationships with key dealers as part of an expanding investigation into the car titan’s alleged misdeeds.