A system for identifying an object impacting a vehicle bumper during a collision. The system receives acceleration values from each of a plurality of sensors and calculates a center strength value based on the acceleration values. The center strength value is indicative of the amount of force that is applied to the center of the vehicle bumper. The system then determines a preliminary impact location on the vehicle bumper based at least in part on the acceleration values. A normalized intrusion value is calculated based on the center strength value, the impact location, and a bumper stiffness factor. The bumper stiffness factor is indicative of the stiffness of the bumper at the impact location. The system then identifies the object impacting the vehicle bumper based at least in part on the normalized intrusion value.