I WAS DRIVING APPROXIMATLY 45 MPH ON ST RT 28 IN MILFORD OHIO AND MY DOOR WAS LOCKED AND THE DOOR AJAR LIGHT FAILED TO INDICATE ANY FAILURE IN SECURING THE DOOR APROPIATLY, WELL AS I BEGAN BRAKING TO REDUCE SPEED MY DOOR FLEW OPEN AND I REACHED OUT TO SHUT IT AS I WAS APPLIEING PRESSURE TO THE BRAKE AND THEY COMPLETELY FAILED CAUSING ME TO REAR END THE VEHICLE IN MY FRONT, UPOUN IMPACT THE AIR BAG ON THE DRIVE T SIDE ONLY FAILED TO DEPLOY THERFORE CAUSING A SUSTANTIALLY GREATER AMOUNT AND LONGER LASTING INJUYS. THE DOOR SLAMMED SHUT ON MY WRIST CAUSING DEBILUTATING AND LIFE ALTERING INJURY'S INCLUDING THE LOSS OF MY 5 YEAR CAREER AS A EXTERIOR FINISH CARPENTER DUE TO LOSS OF ABILITY TO PERFORM GENERAL TASKS THAT I WAS ABLE TO NOT ONL PERFORM BUT ACTUALLY MASTER BEFORE MY AUTO ACCIDENT