WAS DRIVING APPROXIMATELY 35MPH & STARTED TO APPLY BRAKES. HAD NO BRAKES & REARENDED ANOTHER VEHICLE AT STOP LIGHT. UPON IMPACT WITH OTHER VEHICLE, AIR BAGS FAILED TO DEPLOY. ALSO, PRETENSIONER IN THE SEAT BELTS FAILED TO RESTRAIN DRIVER WHOSE HEAD HIT WINDSHIELD. DRIVER WAS HOSPITALIZED. *AK