CAME OFF OF HIGHWAY AND WHEN I TRIED TO STOP THE BRAKES WENT TO THE FLOOR. WHEN THE BRAKES WERE DEPRESSED AGAIN THEY WENT TO FLOOR AGAIN, RISKING HITTING CARS WAITING AT STOP LIGHT. I WAS ABLE TO STOP BY PUMPING THE BRAKES, BUT NOTICED SMOKE COMING FROM UNDER THE HOOD, WHEN I PULLED OVER AND OPENED THE HOOD I SAW THE AREA AROUND THE CATALYTIC CONVERTOR ON FIRE. THE BRAKE LINE HAD CORRODED AND LEAKED ON THE CONVERTOR CAUSING THE FIRE AND BURNED A WIRING HARNESS AND DAMAGED THE OXYGEN SENSOR ALSO. THE COST TO ME WAS 483.00 WHICH WAS NOT COVERED BY THE EXTENDED WARRANTEE DUE TO RUST BEING THE CAUSE OF FAILURE.