(1) DRIVING ON EXPRESSWAY AT NORMAL HIGHWAY SPEED WHILE ROUNDING CURVE CAR MADE A LOUD SNAPPING NOISE AND BEGAN SWERVINGUNCONTROLABLY TO THE RIGHT. (2) CAR CAME TO REST HALF ON AND HALF OFF OF THE HIGHWAY, LANE HAD TO BE CLOSED AND TRAFFIC JAM RESULTED. (3) DEALER SAID RIGHT FRONT AND REAR UPPER CONTROL ARMS FAILED. PARTS MUST BE REPLACED.*AK