Product review (5 stars): noisy dishwasher is quiet again
We have a Kitchenaid Dishwasher - KUDS type model. I would not recommend buying this particular dishwasher, but if you do have this dishwasher then I highly recommend this replacement part. It was an exact fit and relatively easy to perform.
Watch this instructional video prior to performing the repair https://www.youtube.com/watch?v=QtrKUFMT9BM
Although there are some minor differences, this video is pretty accurate for this part.
Our dishwasher is only about 3 years old. It would make a very loud noise while running. It became obvious the loud noise was the pump circulating water. After installing this new replacement pump, it is as quiet as new. I just hope this one lasts longer than the original.

Amazon.com had the cheapest price I could find. Other sites were $160+. This repair job requires minimal tools and handyman ability, just watch the video. Total job time, just over 1 hour. Save yourself the $ by doing the repair yourself.