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This is only partially true, and contains many out and out false statements. The “hacking” of car automotive systems that continually is referenced in this and similar articles involved connecting a laptop inside the vehicle and attacking the vehicles control systems. Researchers were able to take control of many systems, including braking, transmission, radio, door locks and even engine acceleration and performance.
The key concept here is that they had a computer plugged in physically to the data port in the car.
There has been documented cases that access to the vehicles systems can be hacked into wirelessly through means such as Bluetooth, cellular, and even sending false wireless tire pressure signals, the key is that these attacks have only disrupted the normal function of the cars systems, not taken control of them.
Don Bailey, the person who is quoted in the article appears to have some of his facts misrepresented. No passenger vehicles currently are allowed to use steer by wire systems.
Even the active park assist systems work by modifying the normal power steering “assist”, but there is at heart still a conventional “mechanical” linkage between the steering wheel and a rack and pinion system that controls where the front wheels are pointed at any given time.
Bottom line, I think that talk of remotely taking control and causing a crash is improbable.