Parts for MDB4050AWA — Maytag Dishwasher

We found 42 parts confirmed to fit the Maytag Dishwasher MDB4050AWA.

Compatibility table

Prices shown are an informational reference range only, not an offer or an Amazon price — RepairKitHub does not sell parts directly. Each part links to an Amazon search so you can compare current listings yourself.

Common failure areas on this model

The confirmed parts above group into a handful of failure areas. Here is what each points to and how to check it before you order anything.

Controls, timers and wiring

Symptom: A cycle that stops partway through, an error code or blinking light, or the unit not starting at all.

Check: Look for burn marks or a burnt smell near the board or terminals, and check whether buttons and knobs respond -- a unit that powers on but won't cycle often traces back to this group.

Parts in this group on MDB4050AWA: 99001918 (Float), 99001922 (Short Float), 99001004 (Float), WP99002560 (Float Switch).

Door and drum seals

Symptom: Water leaking out from around the door during or after a cycle.

Check: Check the door gasket for tears, flattening, or a section pulled loose from its channel, and confirm it seats evenly all the way around when the door is closed.

Parts in this group on MDB4050AWA: WP99001326 (Discharge Housing Gasket), WP902894 (Door Gasket).

General hardware and mounting parts

Symptom: A small mechanical or mounting part has failed, cracked, or gone missing.

Check: Compare the physical shape and mounting points to the original piece, and confirm the exact part number against your model plate before ordering.

Parts in this group on MDB4050AWA: WP99003318 (Lower Spray Tower), WP6903304 (Drain Impeller), WP99002354 (Detergent Cup Lid (Gray)), WP99001885 (Dishwasher Tub Corner Baffle), WP99002003 (Ring Reservoir), 902899 (Wax Motor), WPW10117748 (Dishwasher Door Insulation), WP99002780 (Lower Wheel Assembly), WP6918873 (Dishwasher Silverware Basket).

Dishrack hardware (rollers, wheels and tines)

Symptom: A dish rack that binds, drags, or comes off its rail track when you pull it in or out, or a rack with a cracked, loose, or missing wheel or tine.

Check: Pull the rack fully out and check each wheel or roller for a crack or a missing axle pin, and check that tines aren't snapped off or pushed out of alignment along the row.

Parts in this group on MDB4050AWA: 12002218 (Dishwasher Tine Row Assembly), WPW10116789 (Folding Tines Sleeve), 99001429 (Dishwasher Dishrack, Upper), WP99002138 (Rear Bowl Tine), 99001454 (Dishwasher Dishrack, Upper), WP99002135 (Dishrack Guide Rail Stop - gray), WP903093 (White Dishrack Roller), WP99002947 (Tub Wheel - NOT a Rack Wheel).

Filtration and spray system

Symptom: Dishes come out with food residue, spots, or a cloudy film, or you notice leftover debris in the tub bottom after a cycle.

Check: Remove and rinse the filter assembly under the tub, and check that the spray arm spins freely and its jets aren't clogged -- these are the first things to check before assuming a pump has failed.

Parts in this group on MDB4050AWA: 99001788 (Dishwasher Spray Arm Assembly, Lower), WP99001428 (Lower Spray Arm Cap), WP99001788 (Lower Spray Arm), WP912647 (Upper Spray Arm Hose), WPW10116811 (Spray Arm Snap Retainer).

Interior lighting

Symptom: The interior light doesn't turn on when the door opens.

Check: Confirm power is reaching the socket, then check the door-activated light switch before assuming the bulb itself is at fault.

Parts in this group on MDB4050AWA: 99002017 (Rack Cap (Light Gray)).

Storage, trim and cosmetic hardware

Symptom: A cracked shelf, broken door bin, worn hinge, or missing trim piece -- cosmetic and storage wear rather than a functional breakdown.

Check: Match the physical dimensions and mounting tabs of the old part before ordering; these pieces are often model-specific even between visually similar models.

Parts in this group on MDB4050AWA: 912546 (Rack Stop), W10834433 (Door Handle Latch - black), WP6912678 (Hinge Pin), WP912652 (Door Spring), 912799 (Cabinet Screw), WP912653 (Door Spring Linkage), 912615 (Screw Retainer), 911856 (Clamp Spring).

Water inlet and drainage

Symptom: The dishwasher won't fill, or dishes come out with standing water still in the tub bottom after the cycle ends.

Check: Check the inlet valve's screen filter for sediment, and check the drain pump and drain hose for a clog or a jammed object -- a piece of broken glass or a bottle cap is a common culprit.

Parts in this group on MDB4050AWA: WP99001782 (Dishwasher Drain Hose), 99001359 (Dishwasher Water Inlet Valve), WP99001359 (Water Inlet Valve - 120V), 912633 (Dishwasher Water Inlet Tubing).

Door, lid switches and latches

Symptom: The dishwasher won't start, or stops mid-cycle, unless the door is fully latched shut.

Check: Listen for an audible click when the door latches. No click, or a visibly worn or broken latch or strike, points to this part.

Parts in this group on MDB4050AWA: 99002254 (Door Switches and Holder Assembly).

Before you buy

Match MDB4050AWA exactly against the model and serial plate on the appliance itself before ordering anything — a single mismatched character can point to a different production run with different parts. Then check the part number printed or stamped on the part you are replacing against the part numbers in the table above; the printed number is the most reliable way to confirm fitment when a model has gone through multiple production runs. RepairKitHub does not sell parts directly — every part link above routes to an Amazon search for that part number so you can compare current listings and sellers yourself.

How to confirm this is your model

On most dishwashers, the model and serial plate sits on the edge of the door or the tub rim. Match every character exactly, including letters and dashes at the end — appliance model numbers often have similar prefixes but different suffixes for different production runs.

Neighbouring Maytag Dishwasher models

These model numbers sort next to this one in the catalog and are usually the same product family.

• MDB4050AWB — 42 parts
• MDB4050AWW — 30 parts
• MDB4100AWB — 30 parts
• MDB4100AWQ — 28 parts
• MDB4100AWW — 30 parts
• MDB4040AWX — 42 parts
• MDB4040AWW — 43 parts
• MDB4040AWB — 44 parts
• MDB4040AWA — 42 parts
• MDB4030AWW — 43 parts

Other models with this exact parts list

Each model below is confirmed to share the identical compatible-parts list with this one.

• MDB4000AWW — 43 parts

Still not sure?

Use the model lookup tool to search by model or part number, or start from the symptom your appliance is showing.