A cellphone controllable car intrusion system is provided. This system includes a vehicle OEM system, including an electronic control unit (ECU), a diagnostic port, a plurality of OEM cameras, a plurality of OEM sensors, an OEM satellite communication system, and an OEM local communication system. The diagnostic port, OEM cameras, OEM sensors, OEM satellite communication system, and the OEM local communication system being in electric communication with the ECU. A cellphone is provided having a local communication system disposed therein. The cellphone is in wireless communication with the ECU. The cellphone is adapted to configure the ECU to enable operation of the OEM cameras in response to receipt by the cellphone of an alert signal from the OEM sensors, indicating that an intrusion is in process. The alert signals are representative of detection of a monitor event by one or more of the OEM sensors.