I WAS DRIVING ABOUT 40 MPH. THERE WAS A RED LIGHT AND SOME PRECEDING CARS WERE STOPPED AND OTHERS WERE SLOWING DOWN. THE BRAKES FAILED TO RESPOND EVEN AFTER STOMPING ON IT COUPLE OF TIMES. THE BRAKES ONLY DEPRESSED DOWN A LITTLE BIT BUT NOT FULLY (VERY STIFF). THE VEHICLE SLOWED DOWN TO ABOUT 30 MPH, BUT DID NOT COME TO A COMPLETE STOP AND CRASHED INTO THE REAR END OF VEHICLE IN FRONT. AIRBAG DEPLODED AND CAUSED MINOR CUTS AND BRUISES TO THE FACE.