BRAKES FAILED! I PUT THE CAR INTO REVERSE TO BACKUP IN A PARKING LOT. I WAS MOVING SLOWLY (2MPH) AND THE BRAKES FAILED, GOING ALL THE WAY TO THE FLOOR. I ROLLED FOR 15 FEET, PULLED THE EMERGENCY BRAKE AND MY CAR STOPPED, SLIGHTLY TAPPING A PARKED CAR, IMMEDIATELY IN MY REAR, IN THE IN OPPOSITE PARKING SPACE. I LOCATED THE OWNER OF THAT CAR AND THERE WAS ONLY A SMALL SCRATCH AND NO DAMAGE. IT WAS NOT NECESSARY TO EXCHANGE PAPERS. THE CAR WAS RETURNED TO DEALERSHIP ON 9/27/11 AND ADVISED OF BRAKE FAILURE. MY CAR HAS BEEN SERVICED AT THE DEALERSHIP, PER FACTORY MAINTENANCE SCHEDULE. I JUST RECEIVED A MA STATE INSPECTION STICKER IN AUGUST, 2011. MY CAR PASSED MA STATE INSPECTION AT THAT TIME. MY CAR WAS LAST SERVICED ON 8/23/11 AT 50,607 MILES WITH NEW TIRES AND ROTATION, OIL CHANGE, STATE INSPECTION STICKER, CABIN AIR FILTER, FRONT WIPER BLADES, FUEL INJECTOR CLEANING, THE FACTORY ELECTRICAL RECALL FOR THE 099 WS CONNECTOR COVER INSTALLED, AND DIAGNOSTIC CHARGE FOR 'THUMPING NOISE' IN FRONT, FROM PARK TO REVERSE, BUT NOTHING WAS FOUND BY TECHNICIAN, STATING' ALL COMPONENTS IN PROPER OPERATING CONDITION AT THIS TIME' ON MY REPAIR ORDER. ALSO RECEIVED THE HYUNDAI MULTI-POINT INSPECTION REPORT ATTACHED TO MY PAPERWORK FROM TECHNICIAN #753 - "BRAKE INSPECTION" WAS MARKED IN GREEN "CHECKED OK?. THIS HAS NEVER HAPPENED IN MY DRIVING EXPERIENCE. I FOLLOWED FACTORY REQUIRED 15K, 30K AND 45K MAINTENANCE SCHEDULE NOW BRAKES HAVE FAILED. WHY? *TT