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In 3D simulation of vehicle accidents the vehicles are typically treated as one rigid body. This simplification can be used for vehicle to vehicle collisions as well as in impacts with solid objects. To get a realistic movement of the pedestrian in the impact simulation, the pedestrian has to be modeled as a system of rigid bodies interconnected by joints. This paper describes in detail the extension of the discrete kinetic time forward simulation program PC-Crash to deal with multi-body-systems. As one application of this model pedestrians have been modeled. During the generation of this pedestrian model special interest has been focused on a realistic movement of the pedestrian and a short calculation time. The pedestrian model shows to be a good tool to analyze the movement of the pedestrian regarding its post impact kinematics and contact locations on the vehicles and the ground.