Two years after the stunning arrest of Carlos Ghosn over alleged financial misconduct, discussions are underway inside Nissan Motor Co. that could fundamentally reshape the world’s biggest car alliance and unwind a key part of its former chairman’s legacy.

The automaker is exploring ways to sell some or all of its 34% stake in Mitsubishi Motors Corp., people with knowledge of the matter said. Concern is mounting within Nissan that it will take longer for the company to recover from the pandemic-induced crisis, said the people, who asked not to be identified because the discussions aren’t public. A sale may be the first step in a broader review of the three-way alliance that also includes Renault SA, they said.

Nissan shares jumped 5.4% Monday to their highest since June, leaving the stock down 26% this year. Mitsubishi Motors shares dipped but recovered to close 2.5% higher in Tokyo. Renault shares rose as much as 4.3% in Paris.