[foobazgt]

This isn't a thing, and as a concrete counter-example:

https://www.tesla.com/support/vehicle-warranty

"Yes. Your New Vehicle Limited Warranty will follow your vehicle and be transferred to the new owner when a vehicle ownership transfer is performed through Tesla."

[aidenn0]

Does this imply that everyone who sells a Tesla privately voids the warranty?

[foobazgt]

No, when you privately sell your vehicle, you transfer it through Tesla.