Cover for a device extending from an extension on the front or rear side of a motor vehicle

The cover (10) has an arrangeable flap (11) on the outer side, by which the functional part is accessible when required. The cover encloses the functional part. The cover is open at the lower side. The opening is adjacent to the flap. The cover is formed of plastic. The pivot axis of the flap is formed by a hinge element, particularly by an integral hinge (11a). A holding plate (12) is fastened on a body structure (1).