VEHICLE WAS A 2005 TOYOTA SIENNA VAN. VEHICLE HAS ALWAYS BEEN SERVICED BY TOYOTA DEALERS.ON 8/29/09, I HAD REAR BRAKES REPLACED BY LOCAL TOYOTA DEALER WITH 77,410 MILES ON THE VEHICLE. 10 DAYS LATER, ON 9/8/09, MY ROOMMATE WAS PICKING UP CHILDREN AT SCHOOL. DRIVING ON A 4 LANE ROAD IN TOWN GOING 35-40MPH. TWO H.S. STUDENTS ABRUPTLY STOPPED IN HER LANE. MY ROOMMATE STATED SHE APPLIED BRAKES BUT COULD TELL VEHICLE WAS NOT STOPPING OR SLOWING. RAN INTO REAR END OF A TOYOTA TACOMA P/U WHICH IN TURN REAR-ENDED A HONDA CRV. NO INJURIES IN ANY INVOLVED VEHICLE. HOWEVER, DUE TO THE EXTENT OF DAMAGE, MY SIENNA VAN WAS A TOTAL LOSS. AIRBAGS DID DEPLOY ON IMPACT. MY ROOMMATE STATED FROM THE BEGINNING THAT SHE HAD APPLIED THE BRAKE TO THE FLOOR AND THE VAN DID NOT BRAKE OR SLOW DOWN. THERE WERE NO BRAKING/SKID MARKS ON THE PAVEMENT AT AREA OF ACCIDENT. EITHER THE BRAKE SYSTEM TOTALLY FAILED OR THERE WAS FAULTY WORK DONE DURING BRAKE REPLACEMENT 10 DAYS EARLIER. *TR