Product review (5 stars): Easy Fix!
Some people said the part was not genuine Whirlpool.  It IS manufactured by the same company that manufactured the part that it was replacing.  The only slight difference is that the mounting screw from the original part is slightly larger than the mount for the new part.  (so i really had to crank down on it to get it attached)  The old part is VERY easy to remove and replace with new one.  I saved a LOT of money by doing the work myself. (and it only took 20 minutes to swap out the parts and get the dishwasher running again!)