A bonnet bumpstop for use on an automotive vehicle is formed with a first component having a support part for supporting a bonnet on the vehicle in the vertical direction during normal operation when the bonnet is closed against the automotive frame, a second component attachable to the vehicle frame, and a member interconnecting the first and second components to each other. When the bonnet bumpstop incurs a force greater than a predetermined value, such as a force transmitted from a bonnet to the bonnet bumpstop, the bonnet bumpstop is collapsible by substantially instantaneous neutralizing of the interconnection between the first component and the second component. At least a part of the first component, including said support part, is then freed to be move relative to the second component so as to allow the bonnet to move downwardly in case of an impact between an object and the bonnet.
