MY WIFE DROVE FROM LAS VEGAS ON 15 FWY BACK HOME WHEN THE ENGINE LIGHT CAME ON. ABOUT 10 MINUTES LATER, THE VEHICLE PULLED TO THE LEFT SO SHE STEERED TO THE RIGHT BUT IT PULLED TO THE LEFT AGAIN. WHILE THE VEHICLE WAS PULLING, SHE APPLIED BRAKES TO SLOW IT DOWN BUT IT SEEM LIKE THE VEHICLE WENT FASTER AND FASTER. SHE HEARD A SOUND "SHHH" SOUND LIKE A VACUUM LEAKS. THE STEERING WHEEL WAS PULLING TOO HARD TO THE LEFT SO SHE COULD NOT HOLD ON ANYMORE. THE CARE THEN WENT OFF ROAD AND ROLLED OVER, LANDING IN THE SECTION SEPARATING THE CARS GOING TO LAS VEGAS AND THE CARS GOING BACK. AFTER LANDING SHE SCREAMED HOW THE BABY, HOW THE BABY, HE WAS 14 MONTHS, HOW EVERY BODY--HER DAUGHTERS AND PARENTS...ALL 4 TIRES ARE SUV MICHELIN, JUST REPLACED ABOUT A MONTH. WE BELIEVE SOME THINGS WAS WRONG WITH THE VEHICLE.