DD31-00013B Dishwasher Spray Arm Motor

For Samsung dishwasher owners dealing with weak or inconsistent spray-arm movement, the DD31-00013B is a replacement motor rather than a complete spray-arm assembly. It’s meant to address a specific repair need, not routine cleaning or a general dishwasher performance problem. You’ll appreciate it if your dishwasher model and the part number match the listed fit information. Before starting, remember that the maker describes this as a DIY replacement, but the job involves opening the dishwasher and disconnecting power.

Best use cases

This motor may be worth considering when the spray arm spins weakly, stops intermittently, or makes unusual noise, and you’ve identified the motor as the part needing replacement. For example, if a load comes out with dishes toward the back still dirty and you can see the spray arm struggling to move, this is the kind of repair the part is intended to address. Those symptoms can have other causes, though, so they don’t confirm on their own that the motor has failed.

The practical choice is between replacing a suspected failed component and moving to a larger repair, such as replacing the dishwasher. A targeted part replacement makes more sense when the appliance is otherwise usable and the fault has been narrowed down, if the cause is uncertain, buying a motor based only on poor cleaning could leave the original problem unresolved. The maker says replacing it can restore spray coverage, but that outcome depends on the motor being the issue and the part fitting your exact unit.

Product specs

Name: DD31-00013B replacement spray arm motor Type: Dishwasher waterwall spray arm motor Also listed as: 50KTYZ synchronous motor Replacement part numbers: 4000924, AP5917177, PS9606349, EAP9606349, and SRM-36HR

The product listing names a range of Samsung dishwasher models, including select DW80H, DW80J, DW80M, DW80R, and DW60M series units. The model list includes specific suffixes, and some entries appear in more than one form, so match the complete model number on your dishwasher—not just the series name—against the listing. Also compare the number on the motor you’re replacing with the listed replacement numbers. Similar model names alone aren’t enough to establish fit.

Installation is described as removing the inner panel and swapping the motor after disconnecting power. That gives a sense of the repair involved, but there are no installation instructions or skill requirements provided here. If you’re not comfortable accessing internal dishwasher parts safely, a repair technician may be the more sensible route.

Where it shines

Its appeal is specificity: this is a replacement motor with named part-number equivalents and a substantial list of compatible Samsung models, rather than a universal component with unclear fit. That can help narrow a repair when the dishwasher’s spray-arm drive is the confirmed issue. In a typical use case, you’d identify the exact model and existing part number first, then decide whether a component-level repair is preferable to replacing the appliance or paying for broader troubleshooting.

The limitation is just as important: the listing does not provide dimensions, wiring details, installation steps, or independent evidence that the motor will fix every cleaning or noise complaint. It also does not establish compatibility with every Samsung dishwasher. It’s not for you if your model or part number isn’t listed, or if you’re looking for a complete spray arm rather than its motor. According to the maker, the motor is designed for a straightforward DIY swap, that should not be taken as a guarantee that the repair will be easy on every unit.

Buying verdict

Consider the DD31-00013B when you’ve confirmed a failed spray-arm motor, verified your dishwasher’s full model number, and matched the replacement number before ordering. That’s a focused repair path for an otherwise serviceable machine. If you’re diagnosing the problem from dirty dishes alone, or can’t confirm the fit, pause before buying: a motor may not address the cause, and a wrong-fit part turns a targeted repair into extra troubleshooting.