Approaches are provided for identifying the origin of a vehicular impact and selectively exchanging data pertaining to the impact. An approach includes determining whether an impact to a vehicle exceeds a predetermined threshold. The approach further includes when the impact exceeds the predetermined threshold, sending a signal that includes impact information and identifier information stored in a persistent storage device. The approach further includes receiving signals from one or more other vehicles within a predetermined proximity of the vehicle. The approach further includes comparing impact information from the signals to the impact information stored in the persistent storage device. The approach further includes when the impact information from the signals matches the impact information stored in the persistent storage device within a tolerance threshold, storing the impact information and identifier information from the signals in the persistent storage device.