An energy absorber for a vehicle includes an elongate member having lateral and longitudinal axes. The elongate member may include one or more channels which are oriented to have walls which extend in the general direction of the lateral axis. An upper surface of at least one of the channels may have an engagement feature that may be configured to engage a stationary member of a vehicle when an impact force brings the engagement feature into contact with the stationary member. The channels may be configured to deform and collapse to absorb at least some of the impact force.