Abstract: Our invention describes a device adapted to provide a vehicle with two or more doors, with an Anti-theft Locking System that will prevent the unauthorized opening of one or more of the doors even if the original equipment locks are open, or forcibly opened. An electro-magnet with dual polarities, mounted inside the door panel, facing toward the post, having an actuator shaft, that, when activated by the flow of current, will engage a receptacle within the post, thereby locking the door permanently until deactivated. A key switch, mounted on the outside of the vehicle body, preferably in an unobvious place, two contact points, and a neutral point for key disengagement, using the vehicle battery as a source of power, will provide current to move the shaft of the electro-magnet into or out of the receptacle; thereby activating or deactivating the system.