Automakers have been scrambling to partner with tech firms to head off competition from self-driving cars and car sharing services that threaten to eventually trim demand for car ownership.
The company is developing a next-generation taxi for the Japanese market and it has formed a partnership with the country's hire-taxi federation to explore uses for new technology.
Some of the automaker's gasoline-electric hybrid Prius models contain both of the potential defects, taking the total number of vehicles affected by the recalls to 3.37 million.
The Japanese automaker is discussing an acquisition of Boston Dynamics -- known for the Cheetah, which is claimed to be the world's fastest-legged robot.
Toyota Motor Corp said on Monday it will recall almost 1.6 million additional U.S. vehicles for front passenger side Takata air bag inflators that could rupture.
