Could a hacker hijack your connected car?

As more carmakers adopt "over the air (OTA)" software updates for their increasingly connected and autonomous cars, is the risk of hacker hijack also increasing? Imagine jumping in your car but being taken somewhere you didn't want to go - into oncoming traffic, say, or even over a cliff. That may seem like an extreme scenario, but the danger is real. Hackers showed two years ago that they could remotely take control of a Chrysler Jeep. And earlier this year, Tesla boss Elon Musk warned about the dangers of hackers potentially taking control of thousands of driverless cars.