NOVEMBER 4, 2017 - CAR WAS PARKED IN OUR DRIVEWAY. PUT THE CAR IN REVERSE TO BACK OUT OF OUR DRIVEWAY. THE BRAKES FAILED. NO MATTER HOW MANY TIMES THE BRAKE PEDAL WAS REPEATEDLY PUSHED DOWN, THE CAR JUST WOULD NOT STOP. IT ACTUALLY FELT LIKE THE CAR WAS ACCELERATING! THE CAR RAN OVER OUR MAILBOX AT THE END OF OUR DRIVEWAY. THE MAILBOX GOT DRAGGED UNDER THE CAR AND THE CAR ROLLED OUT ONTO THE STREET. FINALLY, WE PUSHED IN THE POWER BUTTON AND THAT WAS HOW WE WERE ABLE TO GET THE CAR TO STOP. OUR MAILBOX GOT TOTALED AND DAMAGE WAS DONE TO THE UNDERCARRIAGE OF OUR CAR, AS THERE IS TWISTED METAL HANGING DOWN SCRAPING THE GROUND. THE BRAKES STARTED TO WORK AGAIN A FEW MINUTES LATER, AS I WAS ABLE TO PULL IT BACK INTO THE DRIVEWAY OFF OF THE STREET. ON SEPTEMBER 19, 2017 ' CAR WAS PARKED IN A PARKING LOT. WHEN REVERSING OUT OF THE PARKING SPACE, THE BRAKES DID NOT WORK. AFTER REPEATEDLY PUMPING THE BRAKES, THEY FINALLY ENGAGED JUST BEFORE IT HIT A CAR PARKED BEHIND US. WE THOUGHT THIS WAS A FREAK ONE-TYPE EVENT, SO WE DIDN'T REPORT IT.