VEHICLE LOST STEERING AND WENT INTO AN UNCONTROLABLE SKID. TOTAL VEHICLE'S ROTATION WAS GREATER THAN 360 DEGREES. CROSSED THREE LANES OF INTERSTATE TWICE BEFORE CONTACT WITH CONCRETE HIGHWAY BARRIER. INSURANCE HAS CONDUCTED AN INDEPENDENT INVESTIGATION AND DETERMINED THAT STEERING COMPONENTS SEPARATED CAUSING COMPLETE LOSS OF STEERING. LEFT REAR TIRE FAILED AFTER LOSS OF STEERING.*AKY