Abstract: A system and method for detecting an intrusion or a bug in a vehicle data transmission system. A hardware-software complex (HSC) is used to find a bug or intrusion device in a vehicle electronic system. The HSC is connected to CAN-buses in the vehicle and also scans radio waves, which can be used to transmit data to a bug. This complex is a self-teaching CAN-system used to monitor and block harmful commands in the vehicle. Each vehicle (of each model, type and settings) has its own reference bus data (parameters), which is used to detect added modules and malicious data sent over the vehicle's CAN bus.