This is a single lower spray arm found in dishwashers to spray water and detergent vigorously over the dishes. This spray arm is made of plastic, so can warp or crack with time. The holes in the spray arm can get clogged with debris, so it should be cleaned every so often. If it is beyond cleaning or damaged, it will need to be replaced. If the holes are clogged, this can sometimes mean there is a problem with the filter system, so it is a good idea to inspect this as well. For this repair, start by turning off the water supply to the dishwasher. Pull the lower rack out of the dishwasher and out of the way. Remove the lower wash arm. Using a flathead screwdriver, push the small locking tabs located on each side at the bottom of the spray arm. You should now be able to easily pull the spray arm out of the dishwasher. Align the new lower wash arm and push it down to secure it in place. Make sure it can spin freely and is not making contact with the heating element. Place the lower dishrack back into the appliance and close the door.
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