# Precor EFX 5.21 5.23 5.25 Elliptical Flywheel Pulley Bearing (MX172)

\## Precor EFX Flywheel Pulley Bearing MX172

The Precor EFX 5.21, 5.23, and 5.25 Elliptical Flywheel Pulley Bearing is a preowned replacement part for the flywheel pulley assembly in compatible Precor EFX elliptical machines. This bearing helps support the flywheel pulley during operation and can serve as a replacement when the existing component requires service. If you are repairing one of these Precor elliptical models, part number MX172 provides a specific replacement option to check against your machine and original part.

## Product Details and Benefits

This product is identified as the \*\*Precor EFX 5.21 5.23 5.25 Elliptical Flywheel Pulley Bearing\*\*. The product part number and SKU are \*\*MX172\*\*, which also appears as the barcode for this item. It belongs to the Precor fitness equipment parts range and comes in \*\*preowned condition\*\*.

A properly matched flywheel pulley bearing supports the pulley component within the elliptical’s drive system. Replacing a worn, damaged, or serviceable bearing can help restore the related assembly without replacing the entire elliptical machine. This makes the part useful for equipment repair, maintenance, and the continued use of an existing Precor EFX trainer.

Each part has been carefully inspected by skilled technicians for performance and safety before sale. Because this is a used fitness equipment part, it offers a practical way to repair compatible equipment while helping extend the useful life of an existing component. The item may show differences in appearance from the product photos because the seller carries multiple units in stock.

## Compatibility and Applications

The MX172 flywheel pulley bearing is listed for use with these Precor elliptical models:

\- \*\*Precor EFX 5.21\*\*  
\- \*\*Precor EFX 5.23\*\*  
\- \*\*Precor EFX 5.25\*\*

This part is intended for the flywheel pulley area of the listed Precor EFX elliptical machines. It is suitable for customers repairing or maintaining compatible Precor fitness equipment, including home, commercial, and service-shop applications where one of these models requires a replacement flywheel pulley bearing.

Compatibility should be based on the exact elliptical model and the original component being replaced. The listing identifies the part as MX172; use this number when comparing the replacement with your existing bearing or service records.

\## Why Choose This Replacement Part?

The Precor EFX flywheel pulley bearing gives you a targeted replacement for the bearing used in the compatible flywheel pulley assembly. Choosing the correct individual part may help avoid replacing a larger assembly when only the bearing requires attention. The preowned condition also makes this component a suitable consideration for repair projects where maintaining an older Precor elliptical matters.

## Before You Buy

Confirm that your equipment is a \*\*Precor EFX 5.21, EFX 5.23, or EFX 5.25\*\* model. Also verify the original part and part number \*\*MX172\*\* before ordering. Product photos are provided for reference only, so the part you receive may look slightly different from the pictured item while remaining the exact listed model and component. The product page does not provide dimensions, material details, installation instructions, warranty information, or package quantity, so contact the seller if you need those details before purchase.

## Details

- **Price:** 149.99 USD
- **Vendor:** Precor
- **Type:** Miscellaneous
- **Tags:** All

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 149.99 USD | In stock |

## Images

- MX172
- MX172
- MX172
- MX172

## Additional Information

- **Condition:** PREOWNED

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> Source: [Cardio Equipment Parts](https://www.cardioequipmentparts.com/products/precor-efx-5-21-5-23-5-25-elliptical-flywheel-pulley-bearing-mx172)
> Updated: 2026-08-29