Toyota is recalling 615,000 Sienna minivans in the United States.
The recall involves 2004 through 2009 models.
The automaker says shift-locking devices can be damaged causing the minivans to shift out of park and roll away.
So far Toyota says there are 21 accident reports and two injuries due to the problem.
Owners of affected vehicles will be notified by mail. Dealers should replace the shift-lock device for free.