OEM vs Aftermarket DD31-00005A Drain Pump for Samsung: Honest Comparison (DD31-00005A)

Your Samsung dishwasher won't drain. Water's sitting in the bottom, dishes are still dirty, and you're staring at a $280 OEM drain pump quote from the parts supplier versus a $116.99 aftermarket option. That's a $163 difference — enough to make anyone pause.

I've installed both OEM Samsung DD31-00005A drain pumps and quality aftermarket versions in models ranging from the DMT300RFS to the DMR78AHW. Here's what actually matters when you're making this call.

Quick Answer

The aftermarket DD31-00005A delivers identical performance for dishwashers like the DMT400RHS or DMR77LHB at 58% less cost. Unless you're within warranty or need same-day dealer service, the aftermarket pump offers better value with the same fix for the "not draining" symptom you're experiencing.

Side-by-Side Comparison

When OEM Makes Sense

There are specific situations where paying 2.5x more for the Samsung-branded pump is justified:

You're still under manufacturer warranty. If your DMT610RHB is 14 months old and covered, the service center will only install OEM parts. Using aftermarket voids that coverage.

Insurance or commercial requirements. Some property insurance policies or commercial kitchen setups require OEM parts for claim purposes. Check your policy before ordering.

You need it today and there's a dealer nearby. If you're running a rental property or need the dishwasher fixed before guests arrive, same-day pickup might justify the premium. But honestly? Most Samsung dealers don't stock the DD31-00005A anyway.

You want the Samsung box for resale value. If you're flipping the house next month, having receipts with the Samsung logo might matter to picky buyers. For personal use? Doesn't matter at all.

When Aftermarket Wins

For most DIY repairs on models like the DMR57LFW or DMT400RHB, the aftermarket pump is the smarter play:

The failure mode is identical either way. When drain pumps fail on Samsung dishwashers, they typically stop draining completely. The motor burns out or the impeller seizes. A new pump — OEM or aftermarket — fixes this the exact same way. There's no "quality" difference in the repair outcome.

You're paying for performance, not a logo. The motor specs are identical: same voltage, same amperage draw, same GPM flow rate. Both pumps use the same mounting bracket design that fits the DMT300RFS and DMR78AHS models. The wiring harness connector is identical.

Better warranty coverage. Samsung's 90-day parts warranty is laughable for a component that costs $280. The aftermarket version comes with a full year, and if it fails, you're only out $116.99 instead of nearly $300.

You're doing the work yourself. If you're confident enough to disconnect the hoses and swap the pump (it's honestly not that hard), why pay double? Save the $163 for other repairs or upgrades.

"I've installed at least 40 of these aftermarket DD31-00005A pumps in the past two years across DMT and DMR series dishwashers. Not one callback for failure. Meanwhile, I've had three OEM Samsung pumps fail within six months — all on DMT400 models. The aftermarket version performs identically at half the cost."

The Real Cost Difference

Let's break down what that $163 savings actually means:

• The OEM pump costs $280 from most Samsung parts suppliers
• Add $15–25 shipping (they're heavy)
• Total OEM cost: $295–305

Versus:

• Aftermarket DD31-00005A: $116.99
• Free or low-cost shipping on most orders
• You're saving 60%+ on the same repair

That difference covers a new silverware basket, a set of dishwasher racks, or just stays in your pocket. Either way, your DMR77LHS drains perfectly with the aftermarket pump.

What About Longevity?

Here's the honest truth: drain pumps typically fail due to hard water buildup, detergent residue, or foreign objects (hello, toothpicks and twist ties). The brand on the housing doesn't prevent those issues.

Both OEM and aftermarket DD31-00005A pumps use sealed motor assemblies with similar impeller designs. If you maintain your dishwasher properly — monthly filter cleaning, occasional citric acid rinse — either pump will last 5–8 years.

If you don't maintain it? Both will fail prematurely, and you'll be glad you saved $163 when that happens.

Installation: Identical Process

The mounting points, hose connections, and wiring harness are exactly the same. If you're replacing the pump on a DMT300RFB or DMR57LFS:

1. Disconnect power and water supply
2. Remove lower spray arm and filter assembly
3. Disconnect drain hose and electrical connector
4. Remove three screws holding pump bracket
5. Swap pumps, reconnect everything in reverse

Whether you paid $117 or $295, those steps don't change. Same tools, same time investment, same result.

Our Verdict

Unless you're under warranty or have a specific reason to buy OEM, the aftermarket DD31-00005A drain pump is the clear winner for Samsung models like the DMT400RHW, DMR78AHB, and the entire DMT/DMR series. You get identical performance, better warranty coverage, and keep $163 in your pocket. That's not a compromise — that's a smarter repair decision.

Frequently Asked Questions

Will an aftermarket DD31-00005A void my Samsung warranty?

If your dishwasher is still under the original manufacturer warranty, yes — using non-OEM parts can void coverage. But if you're out of warranty (most Samsung dishwasher warranties are 1–2 years), there's nothing to void. The aftermarket pump won't affect any future claims because there's no warranty left to protect.

Does the aftermarket pump work on all the same models as OEM?

Yes. The aftermarket DD31-00005A fits the same Samsung models: DMT300RFB, DMT300RFS, DMT300RFW, DMT400RHB, DMT400RHS, DMT400RHW, DMT610RHB, DMR57LFB, DMR57LFS, DMR57LFW, DMR77LHB, DMR77LHS, DMR77LHW, DMR78AHB, DMR78AHS, DMR78AHW, and dozens more. It also replaces part numbers AP4342621, DD81-01527A, PS4222308, and 1550731. Same compatibility, different price tag.

What if the aftermarket pump fails after installation?

Contact the seller for warranty replacement. With the 1-year coverage on the aftermarket version versus 90 days on OEM, you're actually better protected. Plus, if you need a second pump two years from now, you've still spent less than one OEM pump would've cost today. The math works in your favor either way.