As a simple counter example you can't tune Front Radar calibration for AEB (Automatic Emergency Breaking). A manufacturer can obviously do it. However, if that

As a simple counter example you can't tune Front Radar calibration for AEB (Automatic Emergency Breaking). A manufacturer can obviously do it. However, if that was allowed in the field, you would likely have whiplash injuries at best or fatalities at worse. My point is some things are 'open' in some popular vehicles for which people have reverse engineered stuff. But there is no liability interest from manufacturers in having this sort of thing in user space.