This paper describes the laboratory test procedures and provides objective impact response targets for assessing the frontal impact biofidelity of the knee/thigh/hip complex and the leg of anthropometric crash test dummies, component test devices, and mathematical models that are used to represent the 50th percentile male adult. A companion paper covers the head, neck, thorax, and abdomen. The test procedures and associated data used to establish the biofidelity targets were selected from a review of all relevant and available post‐mortem human subject testing. Reliable data from well‐defined tests were synthesized to create objective biofidelity targets.