With regards to cars, the right to have an independent shop perform routine maintenance and repair without violating warranty does need to be preserved. As to modify, well I would think that should vacate any warranty and possibly liability as it is now beyond the manufacturers control. This will mean preventing manufacturers from creating costly interfaces to retrieve status codes from cars and their self driving systems.

The issue with modifying self driving algorithm's is that will be so complex as to be nearly impossible to modification and since they are so tightly linked to the safe operation of the vehicle I can expect we will see legislation to prevent it. However such legislation should not preclude being able to view it.

* disclaimer to right of repair comments, I work for major after market supplier to consumers and business in the automotive sector