A knockdown nerf bar for replaceably and adjustably protecting a side of a vehicle from dings and dents. A frame replaceably and adjustably mounts to the vehicle. Mounting apparatus is operatively connected to the frame and mounts the frame to the vehicle. Adjusting apparatus is operatively connected to the frame and replaceably and adjustably attaches the frame to the vehicle. The frame has a pair of subframes connected to each other by a plurality of transverse portions that extend horizontally across the side of the vehicle. Each subframe has a stationary portion and a movable portion. The stationary portion mounts to, and extends outwardly from, the underside of the vehicle by the mounting apparatus. The movable portion is replaceably and adjustably connected to the stationary portion by the adjusting apparatus and extends vertically along the side of the vehicle. The mounting apparatus attaches to the underside of, and the panel flange of the underside of, the vehicle.
A vehicle side underrun protection having at least one load-bearing member that extends between the wheels or sets of wheels of the vehicle in the vehicle's longitudinal direction. The member(s) extend basically along the outer contour of the vehicle and serves as side impact protection and/or protection to prevent unprotected road-users ending up under the vehicle. The side underrun protection (1) has at least one longitudinal section (12, 13, 14) suspended in at least two first brackets (2, 3) fixed to the vehicle, along which brackets (2, 3) at least one end of each individual section (12, 13, 14) of the side underrun protection (1) is vertically adjustable from at least a first, active position to a second, inactive position. The invention also relates to a vehicle provided with such a side underrun protection.