WAS DRIVING 45MPH ON WET ROAD WHEN ANOTHER VEHICLE CUT IN FRONT. APPLIED BRAKES & SLID INTO REAR OF VEHICLE. UPON IMPACT WITH OTHER VEHICLE, AIR BAGS FAILED TO DEPLOY. PROBLEM REPAIRED. SECOND TIME, ROAD DRY & APPLIED BRAKES QUICKLY. HEARD SQUEALING OF BRAKES & TIRES. BRAKES (ABS) FAILED TO STOP VEHICLE. RAN INTO AMBULANCE. ONCE AGAIN AIR BAGS FAILED TO DEPLOY. WENT TO EMERGENCY ROOM FOR TREATMENT. *AK