Brian J Derry , NH December 01, 2023 Appliance: Maytag Dishwasher MDB4949SDM2 Maytag Dishwasher Mdb4949sdm2: The spray arm for upper rack of dishwasher. The back plastic piece was falling off. How to replace Middle Spray Arm Water Supply Tube. I ordered a new spray arm for the upper rack. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes