OEM vs Aftermarket ABQ75742501 Drain Pump for LG Dishwashers: Honest Comparison

Your LG dishwasher just finished a cycle, but there's still standing water in the bottom. You've checked the disposal connection, cleaned the filter, and unplugged the drain hose — nothing's blocked. The drain pump is either making a squealing noise or just humming without actually pumping. Now you're staring at two options: the OEM LG pump at $180–$220, or an aftermarket replacement at $117.99. Which one actually makes sense?

Quick Answer

For most homeowners and techs, the aftermarket ABQ75742501 is the smarter buy. It's the exact same design as OEM (same case, same impeller, same motor specs), fits models like LDF5545ST and LDP6797BD perfectly, and costs nearly half as much. You're paying $117.99 instead of $200+ for identical performance. The only time OEM matters is if you're under LG warranty or need same-day pickup from a local parts counter.

Side-by-Side Comparison

When OEM Makes Sense

If your dishwasher is still under the LG manufacturer's warranty, stick with OEM. Using aftermarket parts can void coverage, and you're probably getting it installed free anyway. The other case: you need it today. Some appliance parts stores stock OEM LG pumps locally — if you can't wait 1-2 days for shipping and you're okay paying double, that's your call.

Beyond that? The OEM premium doesn't buy you anything tangible. The aftermarket pump uses the same housing design, same impeller material, same mounting points. I've installed both side-by-side on LDP6797SS units, and there's zero functional difference.

When Aftermarket Wins

This is where the math gets obvious. You're saving $80–$100, which is half the repair cost right there. The aftermarket ABQ75742501 fits all the same models — LDF5545BD, LDF5678ST, LDFN4542W, LDP6810BD, and dozens more. It handles the same symptoms: water not draining, loud grinding during the drain cycle, or that squealing noise one tech asked about ("My dishwasher squeals each time it pumps out water"). The faulty pump is the faulty pump, and the aftermarket replacement fixes it just as permanently.

The warranty is actually better — 1 year vs. OEM's 90 days. And shipping is faster. LG parts can backorder for weeks if there's a supply crunch; aftermarket ships same-day because it's not tied to one factory's production schedule.

One real-world scenario from a Q&A: a customer checked voltage (120 VAC to the pump), confirmed the motor runs when powered directly, but the pump still wouldn't drain during cycles. That's internal failure — worn impeller, cracked housing, bad seals. Replacing with aftermarket solved it for $117.99 instead of $200+. Same fix, half the cost.

Our Verdict

Unless you're under warranty or need same-day pickup, go aftermarket. The Heima ABQ75742501 is functionally identical to OEM, ships faster, costs $80–$100 less, and has a longer warranty. I've installed hundreds of these pumps — the failure rate is the same, the fit is perfect, and you pocket the difference. It's the no-brainer choice for out-of-warranty repairs.

Frequently Asked Questions

Can I just replace the gasket instead of the whole pump assembly?

No. LG doesn't sell the gasket separately — it only comes with the full pump assembly (ABQ75742501). If the gasket is leaking, you're replacing the whole unit. That's one reason aftermarket makes sense: you're forced to buy the assembly either way, so why pay double?

How do I know if the pump is actually bad or if it's a control board issue?

Check for 120 VAC at the pump terminals during the drain cycle. If you've got power and the pump hums but doesn't spin, the pump's bad (motor or impeller failure). If there's no power to the pump, the control board isn't sending the signal — that's a board issue, not a pump issue. Most squealing or grinding noises with standing water = bad pump.

Will this fit my Kenmore dishwasher with an LG motor?

Yes. Many Kenmore dishwashers (especially models starting with 665.xxxx) use LG components. This pump replaces AP6232017, PS12076726, and works on LG-built Kenmore units. Check your model number against the compatibility list — if it's there, you're good. The pump doesn't care about the brand badge on the door; it cares about the mounting points and wiring, which are identical across LG and LG-built Kenmore models.