Product review (5 stars): All the parts to refurbish the water impeller. 15 to 30 mins to complete repair
With just a torx screw driver it is easy to disassemble/ replace the water impellers (2) and  cutter blade See the you tube video for full directions. Note the the lower plastic shaft is probably rusted onto the motor shaft - use a small hammer and chisel to break up the plastic shaft and impeller so it can be removed.from the steel motor shaft

It took me about 20 minutes to complete the repair. Now the dishwasher runs much more smoothly and does a better job of washing