Abstract: An intermediary access device enables a user electronic device to communicate with a vehicle's onboard computer system. A first wireless transceiver of the intermediary access device is used to establish a secure wireless communication channel between the intermediary access device and a vehicle on-board computer system. A second wireless transceiver of the intermediary access device is used to establish a user-initiated communication channel between the intermediary access device and a user electronic device. User commands and vehicle information can then be transmitted between the vehicle on-board computer system and the user electronic device via the intermediary access device in a safe, secure and efficient manner.