OEM vs Aftermarket Washer Idler Pulley for Whirlpool/Maytag: Honest Comparison (40045001)

Your Maytag SAV2655AWW is making a grinding noise during the spin cycle, and you've narrowed it down to the idler pulley. Now you're staring at two options online: a genuine Whirlpool part for $45–$65, or an aftermarket replacement for under $15. Same part number, same function—but is the cheaper one going to fail in six months?

I've installed both versions in dozens of machines. Here's what actually matters.

Quick Answer

For the 40045001 idler pulley, aftermarket parts perform identically to OEM in most home situations. The pulley is a simple mechanical component—a wheel on a bracket with a spring. Unless you're running a commercial laundromat with 12-hour daily cycles, the aftermarket version will outlast your washer. Save your money.

Side-by-Side Comparison

When OEM Makes Sense

There are exactly three scenarios where I'd spend the extra $40 on the genuine Whirlpool pulley:

You're fixing a commercial machine. If this is in a laundromat doing 8+ loads daily, the slight manufacturing tolerance difference might matter over 10,000 cycles. Might. Even then, I've seen aftermarket pulleys run for years in coin-ops.

You're under manufacturer warranty. Some extended warranties require OEM parts. Check your paperwork before ordering—using aftermarket might void coverage on unrelated future repairs.

You found OEM on clearance for under $20. Sometimes appliance parts suppliers liquidate old stock. If the prices are comparable, sure, go OEM. But I've never actually seen this happen with idler pulleys.

When Aftermarket Wins

For home washers—which is what we're talking about with models like the Amana ALW480DAW or Whirlpool LSR7233—aftermarket is the smart call.

The idler pulley is a wear part. It's designed to be replaced. The wheel spins on a simple bearing, the spring provides tension, and the bracket bolts to the frame. There's no circuit board here, no calibration required. Aftermarket manufacturers have been making these for 15+ years—they've got it figured out.

The most common failure mode is bearing seizure, which causes that telltale grinding noise and can lead to a burning smell if ignored. Both OEM and aftermarket pulleys fail the same way, at roughly the same frequency. The bearing itself usually comes from the same third-party supplier regardless of who assembles the final part.

Speed matters too. When your washer won't agitate or spins slowly because the belt's slipping off a worn pulley, you need the part now. Waiting a week for an OEM part to ship from a Whirlpool service center means a week of laundromat trips. Aftermarket ships immediately.

Our Verdict

Unless you're repairing under warranty or running a commercial operation, buy the aftermarket 40045001. It's the same part for 75% less money. I've installed hundreds of these in Maytag and Whirlpool washers—the failure rate is identical to OEM, and you'll have it installed before the dealer even processes your OEM order. Put the $40 savings toward the belt if yours is cracked.

One practical tip: order the pulley and belt together. If the pulley wore out, the belt's probably glazed or stretched. You're already tipping the machine and removing the front panel—replace both while you're in there.

Frequently Asked Questions

Will an aftermarket idler pulley void my washer warranty?

Not for the pulley itself—it's a wear item. But if you're within the first year of ownership or have an extended warranty, check the terms. Some contracts require OEM parts for all repairs to maintain full coverage on electronics and other components. For out-of-warranty machines, use whatever part makes sense.

How do I know if the pulley or the motor is causing the noise?

Unplug the washer, remove the front panel, and spin the pulley wheel by hand. If it's rough, grinding, or doesn't spin freely, that's your problem. If the pulley spins smoothly but the machine still makes noise during operation, you're looking at motor bearings or a bad transmission. The pulley should rotate with almost no resistance when the belt's removed.

Can I use this pulley on a dryer with the same model number?

No—the 40045001 is washer-specific despite the product title sometimes causing confusion. Dryer idler pulleys mount differently and handle higher temperatures. The spring tension is also calibrated differently. If you need a dryer idler pulley for a Whirlpool or Maytag, you're looking for part numbers in the 279640 or 691366 range, depending on your model. Always cross-reference with your actual machine's model plate.