I've been experimenting with black boxes in cars. These plug into the small scart type socked under the steering wheel.

In my car an over-revving problem has simply gone away since plugging in the box.

I know of one guy who took his BMW to a dealer with an engine misfire problem only to be presented with the black box as the source of the problem.

Vehicle manufacturers or more accurately their component suppliers need to agree on standards first before they start mucking around with operating systems. It's not just that a hacker might find it funny to make your car zoom off in the night but that a legitimate action might trigger that due to the register X meaning accelerate on one model and demist on another!