The dishwasher started making a lot of noise during certain parts of the wash cycle.

A Kitchenaid repairman came to look at the dishwasher and found that the rotor needed to be replaced but none were in stock. The part was on backorder and the price would be $75 plus a $55 installation fee.

I went online and found the exact same part at PartSelect for $37.98 plus shipping and when it arrived, replaced the defective rotor easily. Now the dishwasher is whisper quiet like it was when new. I saved a little over $80 by ordering from PartSelect and replacing it myself.