Toyota's Biggest Supplier to Take Majority Stake in Self-Driving Tech Firm

TOKYO-- Toyota Motor Corp. TM -0.84 % 's biggest parts supplier, Denso Corp. DNZOY 1.33 %, said Friday it planned to buy a majority stake in a maker of self-driving technology as it seeks to beef up its offerings to compete with global rivals. The deal to take a 51% stake in Fujitsu Ten Ltd., which builds the sort of radar systems used in autonomous driving systems, is Denso's third such deal since December. Denso will acquire shares from parent company IT firm Fujitsu Ltd. FJTSY 0.04 % The companies declined to say how much Denso would pay. Separately, Toyota will retain its current stake in Fujitsu Ten of a little over a third. Car makers from General Motors Co. GM -0.77 % to Tesla Motors Inc. are adding systems that take over some driving tasks in order to make cars safer.