# Precor EFX 635 665 685 Elliptical Main Drive Belt (MX376)

\## Precor EFX 635, EFX 665, and EFX 685 Elliptical Main Drive Belt

The Precor EFX 635, EFX 665, and EFX 685 Elliptical Main Drive Belt is a replacement drive belt for compatible Precor elliptical machines. This part helps transfer power through the machine’s main drive system during operation. If the original belt has worn out or needs replacement, the MX376 belt can help restore the drive system to working condition, provided it matches your equipment.

This product is listed as a \*\*preowned Precor main drive belt\*\*. It carries the part number and SKU \*\*MX376\*\*, which you can use when comparing the part with the belt currently installed in your elliptical or with the part information in your equipment documentation.

## Product Details and Benefits

The MX376 is a main drive belt designed for use in selected Precor EFX elliptical trainers. The main drive belt forms part of the mechanism that transfers movement through the elliptical as you exercise. A replacement belt may be useful when the existing belt is no longer suitable for continued use or when you are servicing an older machine.

Replacing the correct drive belt can help you maintain the original drive-system layout of the elliptical without replacing unrelated components. It also gives equipment owners and service technicians a specific replacement part to identify when repairing a compatible Precor EFX machine.

The product is sold as a preowned component. Because condition and fit are important for replacement parts, inspect the listing details and compare the part number before ordering.

## Compatibility and Applications

This Precor elliptical main drive belt is listed for the following models:

\- Precor EFX 635 elliptical  
\- Precor EFX 665 elliptical  
\- Precor EFX 685 elliptical

The part is intended to replace the main drive belt in a compatible Precor EFX elliptical trainer. It is not described as a universal elliptical belt, so buyers should confirm that their machine model and existing part match the listed application.

\### Why Choose This Replacement Belt?

The MX376 provides a clearly identified replacement option for owners, repair shops, and technicians servicing compatible Precor EFX equipment. Using the correct model-specific part can make it easier to match the replacement with the machine’s original drive system. This belt may be suitable when maintaining a Precor EFX 635, 665, or 685 elliptical and sourcing a preowned replacement component.

## Before You Buy

Verify your elliptical’s exact model before placing an order. Confirm that it is a \*\*Precor EFX 635, EFX 665, or EFX 685\*\* and compare the existing belt or service information with part number \*\*MX376\*\*. The product page identifies the item as \*\*preowned\*\*, so review the available listing information carefully and consider the condition shown before purchase.

\*\*Brand:\*\* Precor  
\*\*Product type:\*\* Elliptical main drive belt  
\*\*Part number:\*\* MX376  
\*\*SKU:\*\* MX376  
\*\*Condition:\*\* Preowned  
\*\*Compatible models:\*\* Precor EFX 635, EFX 665, and EFX 685 ellipticals

## Details

- **Price:** 34.99 USD
- **Vendor:** Precor
- **Type:** Miscellaneous
- **Tags:** All

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 34.99 USD | In stock |

## Images

- MX376
- MX376
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- MX376
- MX376

## Additional Information

- **Condition:** PREOWNED

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> Source: [Cardio Equipment Parts](https://www.cardioequipmentparts.com/products/precor-efx-635-665-685-elliptical-main-drive-belt-mx376)
> Updated: 2026-08-29