SPRINGS FROM THE REAR SEAT BROKE THROUGH THE CUSHION & ENTERED THE ELECTRICAL WIRING HARNESS. HAD NOTICED SMOKE COMING FROM UNDER THE CSS. HAD TURNED VEHICLE OFF & TOOK CHILD OUT OF SEAT. THE NEXT DAY, TOOK VEHICLE TO DEALER & HAD IT CHECKED. A FIRE HAD OCCURRED UNDER THE SEAT WHERE THE CSS WAS LOCATED. *AK