A theft barrier assembly includes a plurality of panels. Each panel is pivotally disposed on a bottom side of a vehicle. Each of the panels is positionable in a deployed position to inhibit a person from sliding beneath the vehicle. Each of the panels is positionable in a stored position to facilitate normal operation of the vehicle. Each of a pair of actuating units is movably disposed on the bottom of the vehicle and each of the actuating units urges respective panels into the deployed position and the stored position. A receiver is integrated into the vehicle and the receiver is in electrical communication with each of the actuating units. A remote control is in remote communication with the receiver for remotely controlling the actuating units.