IN OCTOBER WHILE DRIVING ON THE HIGHWAY WITH TWO FRIENDS THERE WAS A LEAK IN EXHUAST SYSTEM. BECAUSE EVERYONE IN VEHICLE FELL ASLEEP, THEY RAN OFF THE ROAD AND HIT A 10 FOOT ENBANKMENT. PASSENGER SUFFERED SOME SERIOUS INJURIES TO HIP/HEAD,/RM, AND SOME INTERNAL BLEEDING. ALL CONSUMERS IN VEHICLE WERE WEARING SEAT BELTS. AIR BAGS DID NOT DEPLOY. THERE WAS NO PRIOR WARNING AS TO AIR BAGS AND EXHAUST SYSTEM FAILURES. *AK *SLC