An air valve device for a motor vehicle comprises an air valve support with a flow opening and has at least one air valve extending into or passing through the flow opening, which is movably seated on the air valve support between a blocking position as one working position, and a flow position as another working position, wherein the air valve in the blocking position provides a greater resistance to a particular flow through the flow opening than in the flow position. A drive device is connected to the at least one air valve for movement between its working positions at least temporarily in a drive force transmitting manner. A control device actuates the drive device. A collision prediction device is designed when in the final state mounted on a motor vehicle, to monitor a monitored zone located in front of the vehicle and to assess the danger of collision, wherein the collision prediction device, is coupled to the control device so as to transmit a signal, and wherein the control device is designed to actuate the drive device to cause the movement of the at least one air valve into a predetermined target position range when the collision prediction device emits a signal which indicates that the danger of a collision is high.