2006 Lexus Ls

I OWN A 2006 LEXUS LS430, WHICH I'VE HAD SINCE NEW. IT ONLY HAS ABOUT 70K MILES ON IT AND HAS BEEN MAINTAINED SOLELY AT LEXUS DEALERSHIP WHERE VEHICLE WAS PURCHASED IN RALEIGH NC. TODAY WHILE REVERSING DOWN A STEEP DRIVE MY VEHICLE SUDDENLY LOST POWER AND CUT OFF. I LOST ALL HYDRAULIC BRAKE ASSISTANCE AND STEERING ASSIST. I WAS MOVING AT ABOUT 8 MPH AT TIME OF FAILURE. NO MALFUNCTION INDICATORS APPEARED ON THE DASH BEFORE OR AFTER THIS. MY VEHICLE HAD AT LEAST 10 GALLONS OF FUEL IN THE TANK AS IT INDICATES ABOUT ⅝ FULL. I WAS ABLE TO RESTART THE VEHICLE AFTER STOPPING AND THE CAR RAN FINE ON MY WAY HOME. I AM SCHEDULING AN APPOINTMENT WITH DEALERSHIP FOR INSPECTION BUT THIS WAS SCARY AND I'M JUST CONCERNED IF THE SAME THING HAPPENED AT HIGHWAY SPEEDS IF IT COULD BE FATAL LIKE THE GM IGNITION RECALL. MY VEHICLE IS EQUIPPED WITH KEYLESS IGNITION SO NO KEYS WERE IN THE STARTER THAT COULD HAVE SWITCHED IGNITION OFF.

I PURCHASED A CERTIFIED PRE-OWNED 2006 LEXUS 430, INCLUDING 2 ADDITIONAL WARRANTIES, FROM LEXUS CHANDLER IN MAY 2009 UPON WHICH I EXPERIENCE AN INABILITY TO START AND UNLOCK THE STEERING WHEEL EIGHT TIMES WITHIN THE FIRST TWO MONTHS AND INTERMITTENTLY MONTHS AFTER. IF I SIT FOR AN HOUR THE SYSTEM WILL UNLOCK ITSELF AND WILL START. DEALER REFUSES TO INVOLVE ITSELF AND CLAIMS IT IS UNABLE TO REPAIR. I TOOK TO ANOTHER DEALER WHICH STATED THEY COULD DISCONNECT THE ANTI-LOCK MECHANISM BUT THEN THE CAR WOULD NOT HAVE ANY SECURITY FUNCTIONS. I HAVE CONTACTED THE STATE ATTORNEY GENERALS OFFICE WHICH THEY HAVE CONTACTED THE DEALER BUT NO RESOLUTION HAS BEEN PROVIDED AT THIS TIME. I HAVE WRITTEN A LETTER TO MY SENATOR, JOHN MCCAIN, ABOUT THE ISSUE AND AM WAITING A RESPONSE. I FEEL THIS IS A SAFETY CONCERN SINCE IT LEAVES ME STRANDED. UPDATED 04/09/10. *LJ THE CONSUMER ALSO STATED THE VEHICLE NEEDED A NEW BATTERY AND TIRES. UPDATED 09/21/10