A cooling air flap device is for a motor vehicle. The cooling air flap device has a cooling air opening through which cooling air can flow. The cooling air flap device has: a cooling air flap, which is arranged in or on the cooling air opening so as to be adjustable in order to change an opening cross section of the cooling air opening through which the cooling air can flow; and a sensor configured to sense surroundings in a region of the cooling air flap device. The sensor is secured to the cooling air flap so that the sensor is adjustable together with the cooling air flap.