Ok but my question was more: can I purchase an Extended warranty and/or and extended service agreement for a preowned car, either bought with Tesla as a CPO or with a third party?Can I transfer my Extended Service Agreement to the new owner if I sell my Tesla vehicle?
Yes, you can transfer the unused portion of your Extended Service Agreement with the sale of your vehicle. The agreement will transfer to the new owner when the vehicle ownership transfer is processed through Tesla. Please refer to the Extended Service Agreement Terms and Conditions for more information.
Source - Vehicle Warranty