ft.com: Fired-up by Google’s driverless prototype, carmakers such as Mercedes-Benz and Volvo are already testing autonomous vehicles on public roads.

But the advanced sensors and electronics that form the building blocks of self-driving cars are often made by suppliers, not the car manufacturer.

Some fear that, in the long term, carmakers that lag behind in autonomous vehicle technology face a future akin to today’s PC assemblers – with the big profits accruing to the companies behind the software and electronic content underneath.

[polldaddy poll=8369984]