Abstract: In this method, in particular for manufacturing a piece of motor vehicle interior equipment comprising a main body (10) made of rigid plastic overmolded onto a coating (12) made of plastic, the coating (12) is manufactured, at least one orifice (32) is formed through the coating (12), a fixing insert (22) is pushed through the orifice (32), the insert is sealed (30, 36; 30, 70) to the coating, the fixing insert (22) is fixed to the coating, the coating (12) provided with fixing inserts (22) is placed in a mold, and the plastic of the main body (10) is overmolded onto the non-visible side of the coating (12), the solidified plastic immobilizing the insert.

Abstract: This dashboard for a motor vehicle comprises a core (4) made of plastic foam, which includes recesses forming air ducts (12), and a covering (20) comprising a fiber mat (22) incorporated into a layer of polymer resin (24). The covering is a stiffening covering (20) completely surrounding the perimeter of the cross section of the core (4) over at least one portion of the length of the latter.