TL*THE CONTACT OWNS A 2004 KIA SEDONA. WHILE DRIVING AT SPEEDS OF 70 MPH THE VEHICLE WOULD CONTINUOUSLY MAKE A JERKING MOTION AND STALL WITHOUT WARNING; HOWEVER, THE PROBLEM WOULD OCCUR INTERMITTENTLY. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THEY COULD NOT DUPLICATE THE FAILURES AND RELEASED THE VEHICLE BACK TO THE OWNER. THE VEHICLE CONTINUED TO STALL INTERMITTENTLY WITHOUT WARNING. THE VEHICLE WAS TAKEN BACK TO THE DEALER A SECOND TIME AND AGAIN THEY COULD NOT DUPLICATE THE FAILURE. HE THEN TOOK THE VEHICLE TO AN INDEPENDENT MECHANIC WHO ALSO COULD NOT DETERMINE THE CAUSE OF THE FAILURE. ON THE THIRD ATTEMPT, A SPECIALIST AT THE DEALERSHIP STATED THAT THE EMISSIONS SENSOR AND THE THROTTLE VALVE WERE REPLACED; HOWEVER, THE FAILURE PERSISTED. THERE WERE NO ADDITIONAL REPAIRS PERFORMED AND THERE WERE NO RECALLS ON THE VEHICLE. THE FAILURE MILEAGE WAS APPROXIMATELY 75,000 AND THE CURRENT MILEAGE WAS 98,000.