WHILE DRIVING AT 20 MPH,THE DRIVER STEPPED ON THE BRAKE PEDAL AND THE BRAKE PEDAL HAD A DELAYED REACTION, WHICH RESULTED IN THE VEHICLE HITTING A WALL HEAD ON. DEALER HAD BEEN NOTIFIED. *AK WHEN THE FIRST INCIDENT OCCURRED, THE BRAKES WERE ENGAGED BUT DID NOT STOP THE VEHICLE, THE ENGINE REVVED AND THE VEHICLE KEPT GOING. THE VEHICLE HAD RUN INTO THE CORNER OF THE FLOWER WALL OF THE STORES SIGN. THE SECOND INCIDENT WAS SIMILAR, BUT THE CONSUMER WAS IN A SCHOOL ZONE AT A STOP SIGN AND THE ENGINE REVVED, THE CONSUMER APPLIED THE BRAKES, THE VEHICLE JUMPED BUT DID NOT STOP. PRESSURE WAS APPLIED THREE TIMES TO THE BRAKES, THEN THE VEHICLE FINALLY HAD COME TO A COMPLETE STOP. THE PROBLEM WAS UNABLE TO BE DUPLICATED. *SCC *JB