I think we are up for another fight on this topic very soon, but not only with Tesla. There are existing laws that force manufacturers to provide standardized maintenance interfaces, provide guidelines to shops etc., but increasingly cars are controlled by propietary computer systems.

And the whole thing takes a turn for the absurd when you consider electric cars. Sure, force manufacturers to provide documentation on how to replace a bumper.. but its purely naive to think you could have just any mechanic service a completely computer controlled high-voltage battery compartment.