Rule number one of buying a new car: get the dealer to disconnect the modem.

Cars should be entirely open source by government regulation. All software should be public and the manufacturer should be required to host and maintain a public toolchain that can reproduce the software and any revisions made. All of this should also get mirrored by the library of Congress and made publicly available as a second source indefinitely. This is about ownership. Digital rights are never okay to reserve. If I do not own everything I am only renting from the real owner. Proprietary goods are theft of ownership. It really is that simple.