21 and 22 which central portion 11 is subjected to stress horizontally by the hinges 21 and 22 an expansion of this central portion 11 thus gives rise to the vehicle being outwardly deformed in bending or u201c bulging u201d by continuity the margins 12 and 13 of the structure 10 of the bodywork component move towards the inside of the vehicle under a tangential effect around the hinges 21 and 22 fig2 shows a motor vehicle bodywork component of the invention specifically a tailgate this tailgate of the invention presents a structure 30 itself fastened to two hinges 21 and 22 also represented by triangles the structure 30 is constituted by a box 31 also referred to as the inner panel and an outer panel 32 also referred merely as a panel in conventional manner the box 31 and the outer panel 32 are placed so that they overlap each other in this example they are assembled together by two peripheral zones 33 and 34 of adhesive the tailgate made up of such a structure 30 also presents a connection part 35 in the form of a spar 35 extending so as to cover the box 31 the spar 35 is placed against a face of the box 31 that faces.