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Sharp SDW4523MS 18-Inch Built-In Dishwasher, vs WD21X31906 Dishwasher Electronic Control Board

Updated July 2026 — Sharp SDW4523MS 18-Inch Built-In Dishwasher, wins on price and noise level, WD21X31906 Dishwasher Electronic Control Board wins on sales rank.

The Sharp SDW4523MS is a comprehensive dishwasher with advanced features, while the WD21X31906 is a necessary electronic control part. Choose based on your needs.

Why Sharp SDW4523MS 18-Inch Built-In Dishwasher, is better

Functionality

Sharp offers multiple wash cycles and features.

Design

Sharp has a modern stainless steel design.

Noise Level

Sharp operates at a quiet 47 dB.

Why WD21X31906 Dishwasher Electronic Control Board is better

Price

WD21X31906 is significantly cheaper.

OEM Part

WD21X31906 is a genuine replacement part.

Compatibility

WD21X31906 replaces multiple part numbers.

Overall score

Sharp SDW4523MS 18-Inch Built-In Dishwasher,
85
WD21X31906 Dishwasher Electronic Control Board
60

Specifications

SpecSharp SDW4523MS 18-Inch Built-In Dishwasher,WD21X31906 Dishwasher Electronic Control Board
BrandSharpAllstar Appliance Parts
TypeDishwasherControl Board
MaterialStainless SteelN/A
Third RackYesNo
Energy EfficiencyHighN/A

Dimension comparison

Sharp SDW4523MS 18-Inch Built-In Dishwasher,WD21X31906 Dishwasher Electronic Control Board

Overview of the Sharp SDW4523MS

The Sharp SDW4523MS 18-Inch Built-In Dishwasher is currently priced at $799.00 and offers a robust set of features tailored for compact kitchen environments. This dishwasher ranks 1738 in sales, indicating a solid presence in the market. Its design, which includes a stainless steel interior and a third rack for flatware, enhances both functionality and aesthetics.

This model is engineered for quiet operation, with a noise level of just 47 dB, making it ideal for open-concept living spaces. It accommodates up to 8 place settings and provides 6 wash cycles, which can be optimized using smart sensors. Additionally, the Wash Zone feature allows users to run either the upper or lower rack independently, promoting water and energy efficiency.

Overview of the WD21X31906

The WD21X31906 Dishwasher Electronic Control Board, priced at $183.99, serves a very different purpose than the Sharp SDW4523MS. This part ranks 4067 in sales and is a genuine OEM replacement part designed to ensure the proper functioning of compatible dishwashers.

It replaces several other part numbers, including WD21X22953 and WD21X32098, making it a versatile option for repairs. However, it’s crucial to ensure compatibility before installation, as parts cannot be returned once installed. This is a specialized component, unlike the multifunctional Sharp dishwasher, which is designed for everyday use in household settings.

Feature Comparison

When comparing features, the Sharp SDW4523MS stands out with its multiple washing cycles and innovative design. It boasts 6 wash cycles and smart sensors for optimized cleaning, while the WD21X31906 focuses solely on providing the necessary electronic control for dishwasher operation.

The Sharp model includes a convenient third rack and options for running smaller loads, which saves water and energy. In contrast, the WD21X31906 does not offer any operational features but is essential for the functionality of certain dishwashers. This makes the Sharp SDW4523MS a comprehensive solution for your dishwashing needs, while the WD21X31906 is a necessary component for maintaining existing appliances.

Price Analysis

The Sharp SDW4523MS is priced at $799.00, which positions it as a premium option in the dishwasher market. On the other hand, the WD21X31906 is significantly cheaper at $183.99, about 77% less than the Sharp model. However, it's essential to consider that the two products serve entirely different purposes, making direct price comparisons somewhat misleading.

While the Sharp dishwasher offers a range of features and convenience for everyday use, the WD21X31906 is a specific part meant for repair or replacement. Therefore, the price difference reflects their functions rather than a direct value comparison.

User Experience

Users of the Sharp SDW4523MS often highlight its quiet operation and efficient cleaning capabilities. The 47 dB noise level is particularly praised, making it suitable for homes where noise is a concern. The ability to wash smaller loads independently is another feature that adds to the user experience, allowing for flexibility in dishwashing routines.

In contrast, the user experience with the WD21X31906 is largely dependent on the compatibility of the electronic control board with existing dishwashers. While it is essential for functionality, users may have varied experiences based on the performance of their specific dishwasher models. This makes it less about user satisfaction and more about maintaining appliance performance.

Maintenance and Durability

The Sharp SDW4523MS is designed with durability in mind, featuring a stainless steel interior that resists stains and ensures a long lifespan. The fingerprint-resistant exterior also makes maintenance easier, appealing to users who want a low-maintenance appliance.

The WD21X31906, being an electronic control board, carries a different maintenance expectation. As a replacement part, it requires installation and can only be maintained through proper usage. Its durability is linked to the overall condition of the dishwasher it is installed in, which can vary widely based on the appliance's age and usage history.

Brand Reputation

Sharp is a well-established brand known for its innovative kitchen appliances, including the SDW4523MS dishwasher, which enhances its reputation with features and user-friendly design. The brand generally receives positive reviews for customer service and product reliability.

Conversely, the WD21X31906 is produced by Allstar Appliance Parts, a brand specializing in appliance replacement parts. While it is recognized for providing genuine OEM components, brand reputation in the repair parts sector may not carry the same weight as a full appliance manufacturer. Users of the Sharp model may benefit from a more cohesive customer service experience compared to those purchasing a repair part.

Which should you buy?

The choice between the Sharp SDW4523MS and the WD21X31906 ultimately depends on your specific needs. If you're looking for a reliable and efficient dishwasher that combines performance with quiet operation, the Sharp SDW4523MS at $799.00 is a solid investment. Its range of features and modern design cater to everyday dishwashing needs.

However, if you require a replacement part for an existing dishwasher, the WD21X31906 at $183.99 is essential for ensuring your appliance continues to operate effectively. While it serves a very different purpose, it is critical for maintaining the functionality of compatible dishwashers. In summary, choose the Sharp SDW4523MS for a new appliance or the WD21X31906 if you need a specific replacement part.