Just because it has a computer does not mean it can be remotely controlled. Cars have had dozens of computers in them for decades now, yet you never hear of them being hacked.
My expertise is in computer chip design (hence the username), and people often don't understand that not everything has remote wireless access, and that it is easy to segregate different systems in the car that may have remote access.
UH, a teen with $15 worth of electronics did indeed hack a car.
Didn’t need to actually do much physically to the car.
Fact is, yes cars can be hacked.