OEM vs Aftermarket LG Drain Pump: Honest Comparison (AHA75673404)

Your LG washer model WT7305CW just finished its cycle, but there's still water sitting at the bottom of the drum. You've diagnosed it down to the drain pump — part AHA75673404. Now you're staring at two options: a $120-$180 OEM pump from LG, or a $40-$60 aftermarket replacement. Let's cut through the marketing and look at what actually matters.

Quick Answer

For most DIY repairs on LG washers, the aftermarket AHA75673404 drain pump delivers identical performance at 60-70% less cost. Unless you're repairing under warranty or flipping appliances for resale, the aftermarket route makes financial sense — especially since drain pumps tend to fail again in 3-5 years regardless of brand.

Side-by-Side Comparison

When OEM Makes Sense

There are legitimate scenarios where paying 3x more for the LG-branded pump is worth it:

• You're still under warranty: If your washer is less than a year old, LG may cover the repair — but only if you use their parts. Installing aftermarket voids that coverage.
• You're selling the appliance: Some buyers feel better seeing OEM parts on a recent repair invoice, even though functionally there's no difference.
• Your repair shop requires it: Some service companies won't warranty their labor unless you use OEM parts. That's their policy protecting their business, not a reflection of part quality.
• You need it today: If there's an LG authorized dealer with stock nearby and you can't wait 24 hours for shipping, convenience wins.

When Aftermarket Wins

For the vast majority of DIY repairs, aftermarket is the smarter play:

• The price difference is massive: You're saving $80-$140 on a part that'll likely fail again in 3-5 years anyway. Drain pumps work hard — they're not lifetime components regardless of who makes them.
• Faster delivery: Heima ships same or next business day. Most LG dealers need to order the part, adding 3-7 days to your repair timeline.
• Better warranty: One year versus 90 days. The aftermarket part is actually covered longer than the OEM.
• Identical function: The aftermarket AHA75673404 bolts in the same mounting points, uses the same electrical connector, and pumps at the same GPM spec. Your washer can't tell the difference.

Here's what matters: drain pumps fail when debris damages the impeller or when bearings wear out. Those failure modes happen on a timeline determined by usage and water quality, not by whether there's an LG logo on the housing.

Our Verdict

Unless you're repairing under active warranty, go aftermarket. The OEM pump doesn't last longer or perform better — it just costs more. Save the $100+ difference for the next repair, because with LG washers, there's always a next repair. We've installed hundreds of aftermarket drain pumps in WT7000 and WT7800 series washers with zero comeback rate difference versus OEM.

Installation Reality Check

Both pumps install identically on models like the WT7305CW and WT7800CV. You'll need to tip the washer back, disconnect the drain hose and wire harness, unbolt the old pump, and reverse the process. Takes 20-30 minutes if you've done it before, maybe an hour your first time. The aftermarket pump comes with the same rubber grommet and uses the same three mounting bolts.

Frequently Asked Questions

Will the aftermarket pump fit my Kenmore washer?

Yes — many Kenmore washers are rebadged LG machines. The AHA75673404 replaces the same pump in Kenmore models that share the LG platform. Check your model number against the compatibility list (it covers 100+ models across LG and Kenmore).

How long do aftermarket drain pumps typically last?

3-5 years with normal use, which is the same lifespan as OEM pumps. Drain pump longevity depends more on water hardness, detergent residue, and whether small items (coins, hairpins) get through the filter. No brand lasts forever when it's pumping debris-laden water 200+ times per year.

Can I return the aftermarket pump if it doesn't fix my draining issue?

Heima offers a satisfaction guarantee — if the part arrives defective or doesn't resolve your "will not drain" symptom when properly installed, you're covered. Just document the installation and symptom. That said, if your washer still won't drain after pump replacement, check the drain hose for clogs and verify the pressure switch isn't stuck — those are common misdiagnoses.