A vehicle bumper assembly has an outer surface and is provided with a bumper having an opening and a lighting optical assembly engaging said opening; the lighting optical assembly has a front wall, defining part of the outer surface, and a rear shell, which supports the front wall and comprises at least one connecting portion fixed to the bumper; the bumper assembly is provided with an additional coupling element, which has an end fixed to the bumper and a supporting portion set behind the rear shell and is set astride of said rear shell; the material, shape, and dimensions of the additional coupling element are such as to render it elastically deformable in the event of impact at a relatively low speed.