A vehicle-to-everything (V2X) enrollment method and communication system of a vehicle includes a transceiver configured for communication with other original equipment manufacturer (OEM) vehicles and an OEM backend system, and a controller in communication with the transceiver and configured to perform a V2X enrollment process. The V2X enrollment process includes, during a first phase, transmitting an identity certificate request to the OEM backend system, and receiving and securely storing a signed identity certificate from the OEM backend system. During a subsequent second phase, the enrollment process includes securely connecting and authenticating with the OEM backend system using the signed identify certificate, and receiving and securely storing a V2X enrollment certificate from the OEM backend system.