Suzuki Motor Corp. says it has sent Volkswagen AG a notice accusing the German automaker of numerous breaches of their 2009 alliance agreement.
The Japanese car maker is seeking "remedies" from Volkswagen or a return of its shares.
Volkswagen owns 19.9% of Suzuki under a partnership inked two years ago that has unraveled in recent months.
Suzuki's board of directors decided last month to dissolve the alliance. In response, Volkswagen said it has no plans to sell its stake in Suzuki.
Chief executive Osamu Suzuki says the deal was intended to give Suzuki access to Volkswagen's technologies. He says he is "disappointed that we have not received what we were promised."