A series of side impact tests have been conducted to evaluate the biofidelity of the EUROSID-1 and BIOSID side impact dummies. These tests were conducted to assess the biofidelity 0f the side impact dummies as specified by the impact response requirements by Draft Proposals at ISO/TC22/SC12(ISO/DP9790-1 to 6). The test results show that both dummies do not completely satisfy the ISO biofidelity requirements. Some portions of the dummies show best compliance with the ISO requirements, while other portions fail to comply with the requirements. In Addition, dummy performance in terms of the proposed thorax injury criteria. i.e., TTI. Rib Deflection, and V*C is analyzed with these test results. Of these results, the better correlation between the EUROSID-1 and BIOSID was obtained for and the better equivalence for TTI.