Motor vehicle front transverse beam comprising a rear fairing element

Motor vehicle front transverse beam (4) intended to be located between a shield skin (2) and a front end (6) of a motor vehicle front assembly (1), said beam (4) being designed to deform by absorbing energy in the event of an impact with the shield skin (2), said beam (4) having a substantially planar front face (8), characterized in that the beam (4) comprises a rear fairing element (10) having a concavity (16) turned toward the front of the vehicle so as to promote a laminar flow of air from the front face (8) of the beam (4) toward the front end (6) of the front assembly (1) of the motor vehicle, and characterized in that the fairing element (10) is formed by a plastic profiled element (22), said profiled element (22) being designed to bend in on itself in order to form the fairing element (10) of closed section.