Ordered complete pump assembly due to age and condition of old unit. Easily replaced unit with the excellent instructions for retrofitting this pump into the unit. Repair was quite easy: remove dishwasher, turn on side, remove old pump and install new one. The video by appliancepartspros was excellent and showed how each part of the repair needed to be performed. I am very pleased with the results. Although this dishwasher is from 1987, it works extremely well and looking over reviews of new dishwashers, the cost of a new one that works well was several times the cost of this part.