COMING OFF OF THE HIGHWAY THE CARS STEERING WHEEL LOCKED UP AND WOULD NOT LET ME TURN IT NOR WOULD MY BRAKE WORK. THE CAR DID A COMPLETE 360 AND SMASHED INTO THE GUARD RAIL ON THE SIDE OF THE HIGHWAY. I WAS ONLY GOING 40 MILES PER HOUR AND ALL OF THE ROAD CONDITIONS WERE CLEAR. THERE WERE NO CARS AROUND ME AND PRIOR TO THE ACCIDENT I HAD ALL CONTROL OF THE CAR. FOR ADDITIONAL DETAIL, THE MECHANIC AND DEALERSHIP STATED THAT WHEN THEY PLUGGED THE CAR INTO THE ELECTRICAL CODE FINDER THAT THEY COULD NOT GENERATE A CODE THAT SHOWED THE WHEEL OR CAR LOCKED UP.