BRAKES FAILED TO FUNCTION WHEN ATTEMPTING TO STOP WHILE GOING 35 MPH ON A DRY, STRAIGHT ROADWAY. THE PEDAL HAD SOME TENSION BEHIND IT BUT DIDN'T FEEL RIGHT, KIND OF SPONGY AND IT WENT ALL THE WAY TO THE FLOOR. SEVERAL PUMPS OF THE BREAK DID NOT RESULT IN SIGNIFICANT BRAKING SO I SPUN THE STEERING WHEEL TO THE RIGHT TO TRY TO AVOID THE CAR THAT WAS STOPPING, BUT COULD NOT CLEAR IT AND MY CAR HAS BEEN TOTALED AND I AM IN PAIN. AIRBAGS ALSO FAILED TO DEPLOY, AND I'D HAVE THOUGHT A 35 MPH CRASH SHOULD HAVE BEEN SUFFICIENT TO TRIGGER THE INERTIA SENSOR.