VEHICLE CONTINUED FORWARD WITH NO BRAKING FOR 2 SECONDS AFTER APPLYING THE BRAKES. VEHICLE DID NOT STOP IN TIME TO AVOID STRIKING THE VEHICLE IN FRONT. FRONT BUMPER WAS DENTED AND PUNCTURED BY STRIKING THE TRAILER HITCH ON THE CAR AHEAD. NO DAMAGE TO OTHER CAR. BRAKE BOOSTER WAS REPLACED LAST YEAR UNDER RECALL FOR SAME PROBLEM. REPAIR HAS DONE NOTHING TO CORRECT THE PROBLEM. THE SAME PROBLEM HAS OCCURED INTERMITTENTLY BEFORE AND AFTER THE "FIX". BRAKES MOMENTARILY FAIL TO ACTIVATE EVERY SO OFTEN, WITH NO PARTICULAR PATTERN OR FREQUENCY. DEALER WAS NOTIFIED, AND STATED THAT UNLESS WE CAN DUPLICATE THE PROBLEM FOR THEM, THEY CANNOT PROVIDE ANY REPAIR OR ASSISTANCE. BECOMING UNEASY ABOUT USING THE CAR. WILL PROBABLY TRADE IT IN FOR SOMETHING DIFFERENT, WHICH IS NOT WHAT WE REALLY WANT. WOULD LIKE TO GET IT FIXED, AS WE LIKE THE CAR. NOT TRYING TO BE DIFFICULT, BUT FELT THAT IT SHOULD BE REPORTED. *TR