NHTSA Complaint #10652966 — 2010 FORD EXPLORER

I OWN A 2010 FORD EXPLORER XLT 4X4 THAT I PURCHASED NEW IN 2009. AT APPROXIMATELY 30,000 MILES THE DRIVER'S SIDE FRONT WHEEL BEARINGS WORE OUT AND WERE REPLACED UNDER WARRANTY. A SECOND TIME AFTER WARRANTY AT APPROXIMATELY 55, 000 MILES THE SAME WHEEL BEARINGS WERE REPLACED AT A COST OF OVER $500. THE ENTIRE WHEEL HUB ASSEMBLY WAS REPLACED AND I WAS TOLD BY THE DEALER THAT THIS IS FAIRLY COMMON? THE TRUCK NOW HAS ONLY 66, 000 MILES ON IT AND HAS 3 SETS OF WHEEL BEARINGS ON THE SAME SIDE. WHAT KIND OF DEFECT IN THE FRONT END CAN BE CAUSING THIS? (I RARELY USE THE FOUR WHEEL DRIVE IF THIS HELPS). *TR