I dont know about whether it is illegal, but it ought not ever be illegal to hack and change your own vehicle, except for changing things like the engine number and the odometer (i.e., legal requirements from the state).
This sits in the same realm as adblockers for a browser.
> Is it even possible?
the car maker might be able to make this impossible, but last i heard, people have done it. Unfortunately, due to a lot of cars being software, the manufacturer could detect and cause headaches for you, in an attempt to discourage it.
I reckon there ought to be laws, akin to the right to repair laws, that ensures you truly own your car and the manufacturer cannot lock you out.
In many countries it is illegal to change anything with the vehicle without going through a homologation afterwards, unless the parts are already homologated. This happens because it affects security and can be a danger to others and you. The consequences can range from fines to the destruction of the car.
Later that evening: “Five killed in car crash. Evidence points to use of seat heaters without paying subscription fee, thus making the vehicle not suitable for highway commute.”
This sits in the same realm as adblockers for a browser.
> Is it even possible?
the car maker might be able to make this impossible, but last i heard, people have done it. Unfortunately, due to a lot of cars being software, the manufacturer could detect and cause headaches for you, in an attempt to discourage it.
I reckon there ought to be laws, akin to the right to repair laws, that ensures you truly own your car and the manufacturer cannot lock you out.