The Prius put Toyota on the map as green car hero No. 1 when the hybrid arrived in 1997. But with the fifth-generation redesign just around the corner, the Prius' hybrid drivetrain faces a test for relevance.
Toyota Group megasupplier Aisin is grappling with how and when to shift to a new lineup of electrified products. Profits made from today's internal-combustion vehicles will lead to investment in EV products.