BACKING UP AT ABOUT 2MPH HIT A PIPE STICKING OUT OF THE GROUND. THE PIPE WAS ABOUT 3 FT. HIGH. IT HIT THE REAR BUMPER ON THE DRIVER'S SIDE. THE BUMPER WAS BENT SO BADLY THAT IT HAD TO BE REPLACED FOR A COST OF ALMOST $600.00. I THINK THIS BUMPER SHOULD HAVE WITHSTOOD THIS TYPE OF ACCIDENT.*AK