Telsa has precisely this problem; they want a lot of control over the repair process. It can be tough to find an independent mechanic to work on them.

https://service.tesla.com/docs/ModelS/ServiceManual/en-us/GU...

> Tesla does not allow the use of any used, recycled, alternative, aftermarket, or third-party replacement parts. Use only new parts ordered directly from Tesla.

Tesla had to fight in court in many of the states for the right to sell directly to customers.

I think Tesla has "show rooms", and then you buy the car from California and import it. So you're not actually visiting a dealership when you visit a Tesla store.