An impact beam for reinforcing a vehicle door includes an elongated beam having a hollow interior spanning a length of the elongated beam. The elongated beam includes an impact portion spanning the length and configured to face an exterior side of the vehicle door. The elongated beam also includes a cross-sectional shape having a top wall section and a bottom wall section that interconnect at a bend section of the cross-sectional shape, which includes the impact portion. The top and bottom wall sections each include an intermediate bend to define a substantially horizontal section and an angled section on opposing sides of the intermediate bend, where the intermediate bends are configured to limit inward displacement of the elongated beam from an impact force at the exterior side of the vehicle door.
