I WAS IN A CRASH YESTERDAY 04/18/17 AT AROUND 4:55-5:00PM DUE TO MY BRAKES NOT REACTING AS THEY SHOULD AND STOPPING MY CAR. I REAR ENDED A CAR BECAUSE OF THIS AND MY FRONT OF MY CAR IS COMPLETELY TOTALED. I HAVE FILED A CLAIM WITH MY INSURANCE, BUT THIS WAS A FRIGHTENING EXPERIENCE. MY AIRBAGS DID NOT DEPLOY, AND NOTICED THAT MY SEATBELT HAD UNFASTENED AFTER THE INCIDENT. I WAS DRIVING ON THE FREEWAY, AND WAS IN TRAFFIC ON THE 405 SOUTHBOUND GETTING CLOSE TO THE 22 FWY EXIT BY SEAL BEACH. IF I WAS GOING FASTER THAN CRUISING SPEED, WHO KNOWS WHAT WOULD HAVE BEEN THE OUTCOME, SEEING THAT THESE 3 RED FLAGS OCCURRED.