Product review (5 stars): This is an easy fix and plenty of Youtube instruction if you are ...
Some had said this part was a knock off so I was slightly hesitant, however mine was an exact copy of the motor and came in the original LG box.  My previous pump was working but in the process of failing and was, as a result, much louder.  Also, sometimes my dishwasher would drain but most of the time it wouldn't.  If these are your symptoms you are probably in the right spot.  This is an easy fix and plenty of Youtube instruction if you are unsure.  My dishwasher drains correctly now and is quiet as can be so that is nice.