Edith R Orwigsburg , PA August 29, 2020 Appliance: Maytag Dishwasher MDB4000AWB Maytag Dishwasher Mdb4000awb: Rusting dishwasher's top rack. How to replace Upper Dish Rack. It was a simple exchange, but I did review helpful video beforehand. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes