Product review (5 stars): Easier installation than I thought!
Super easy installation.  Dishwasher was making very loud grinding noise, but still functioning properly.  An inconvenience in that I couldn't wash dishes while in my open living area.  Bought this, removed 5 screws and wiring harness clip, did the same in reverse with the new part and voila!  No more noise!  Saved $300+ by replacing this part rather than buying new.  Does have O-rings.