OEM vs Aftermarket Dryer Idler Pulley for Whirlpool: Honest Comparison (279640)

Your Whirlpool dryer stopped mid-cycle. You hear the motor running, but the drum just sits there. You've diagnosed it down to the idler pulley — part 279640 — and now you're staring at two options: OEM from Whirlpool at $45–65, or an aftermarket replacement at $26.99. That's a $20–40 difference. Is the OEM worth it?

I've replaced hundreds of these pulleys across models like the WED8300SW1, WED9250WW, and MGDZ600TW. Here's what actually matters when choosing between OEM and aftermarket.

Quick Answer

For most home repairs, the aftermarket 279640 pulley delivers identical performance at half the cost. The OEM pulley offers no functional advantage — same bearing spec, same metal, same mounting. Save the $20–40 unless you're doing warranty work that specifically requires factory parts.

Side-by-Side Comparison

When OEM Makes Sense

There are exactly three situations where I'd recommend paying extra for the OEM pulley:

Your dryer is still under manufacturer warranty. Using aftermarket parts can void coverage. If Whirlpool's paying for the repair anyway, stick with their part.

You're doing commercial or rental property repairs. Some property management companies require OEM documentation for insurance purposes. It's annoying, but it's real.

You already have the OEM pulley in hand. If your local appliance parts store gave you the OEM for the same price or you're getting reimbursed, use it. But don't go out of your way to pay the premium.

That's the list. Notice I didn't say "better quality" or "lasts longer" — because there's no meaningful difference in durability between a properly manufactured OEM and aftermarket idler pulley.

When Aftermarket Wins

For DIY repairs on models like the WED9200SQ0, WGD8300SW1, or GEW9250PW1, aftermarket makes total sense. The idler pulley is a simple mechanical component — a bearing, a wheel, and a bracket. There's no complex electronics, no proprietary materials, just basic metallurgy.

The common failure mode is straightforward: the bearing seizes or gets rough, reducing tension on the belt. Your dryer stops spinning or makes a loud squealing noise. Replacing the pulley fixes it, whether it's OEM or aftermarket.

Here's the practical reality: I've installed aftermarket 279640 pulleys in 2005 Maytags that are still running fine. The bearing quality is identical — sealed ball bearing, same load rating. The metal is the same gauge. The mounting holes line up perfectly.

One huge advantage: the aftermarket pulley ships faster. When your family's laundry is piling up, waiting 5–7 days for an authorized dealer to order the OEM part is frustrating. Heima ships same or next business day, so you're back in business by the weekend.

The installation notes are worth mentioning: "The dryer belt wears out over time. Consider replacing the belt while the dryer is apart." This is smart advice. You're already removing the front panel and drum. Inspect that belt. If it's cracked, frayed, or shiny on one side, replace it now for another $15–20. Doing both parts together saves you from reopening the dryer in six months.

Our Verdict

Bottom line: Save the $20–40 and go aftermarket unless warranty or policy requires OEM. The 279640 replacement pulley performs identically, ships faster, and leaves you money for the belt replacement you should probably do anyway. We've seen these aftermarket pulleys run trouble-free for 10+ years across Whirlpool, Kenmore, Maytag, and KitchenAid dryers.

The math is simple. OEM at $50 + shipping + wait time versus aftermarket at $26.99 with fast delivery. Same bearing, same result, half the cost.

Frequently Asked Questions

Will an aftermarket idler pulley void my Whirlpool warranty?

Only if the dryer is currently under manufacturer warranty. Once that expires (typically 1 year from purchase), you're free to use whatever parts you want. The Magnuson-Moss Warranty Act prevents manufacturers from requiring branded parts for out-of-warranty repairs.

How long does the 279640 idler pulley typically last?

Expect 8–12 years with normal residential use. Failure usually happens from bearing wear — you'll hear grinding or squealing before it completely seizes. If you're already replacing it, that belt tension has been compromised for a while, which is why checking the belt condition during installation matters.

Can I use this pulley on Kenmore and Maytag dryers too?

Absolutely. Part 279640 crosses to AP3094197, 3388672, 697692, and W10468057. It fits Whirlpool-manufactured dryers sold under Kenmore (110 and 795 prefixes), Maytag, and KitchenAid brands. Check your model number against the compatibility list — if it matches models like WED5600XW0, MGDE400XW, or 3CSP276, you're good to go.