A body panel assembly and a method for manufacturing a body panel assembly are disclosed herein. In a non-limiting embodiment, the body panel assembly includes, but is not limited to, an inner panel having a lower portion. The body panel assembly further includes an outer panel that is connected to the inner panel. The outer panel has a main portion, a transitional portion, and a bent portion. The main portion and the bent portion are positioned on opposite sides of the lower portion. The main portion, the transitional portion, and the bent portion are arranged to form a cavity having an elongated configuration below the inner panel. The bent portion defines an opening extending therethrough. The opening is positioned at least partially below the lower portion of the inner panel. The opening provides ventilation to the cavity.