The spray arm in your dishwasher spins and sprays the water that is used to clean your dishes. If the spray arm is damaged, your dishwasher will not clean properly, and you will need to replace it. Many of our customers have rated this repair as easy, and to complete the repair you will simply need to unscrew the old arm, and replace it with a new one. Make sure the jets are facing upward when you secure the new arm. This part is made of gray plastic and is approximately 18 inches wide.