# Precor EFX 576i 556i 546i Elliptical Left Stair Arm Pedal Arm Wheel (MX300)

\## Precor EFX 576i, 556i, 546i Left Stair Arm Pedal Arm Wheel

The Precor EFX 576i, 556i, 546i Elliptical Left Stair Arm Pedal Arm Wheel is a replacement exercise equipment component for the left side of compatible Precor EFX elliptical machines. This part relates to the elliptical’s stair arm and pedal arm movement, helping restore the connection and motion of the left-side assembly when the existing component is worn, damaged, or missing. If you are repairing a Precor EFX elliptical and need the left stair arm pedal arm wheel, this listing identifies the specific part for your equipment.

\### Product Details

This product is listed as a \*\*Precor EFX left stair arm pedal arm wheel\*\*. It is associated with the left-side pedal and stair arm assembly on selected Precor EFX elliptical trainers. The part may help support the moving linkage between the stair arm and pedal arm, depending on the configuration of the machine.

The product name identifies three key details:

\- \*\*Brand:\*\* Precor  
\- \*\*Part type:\*\* Left stair arm pedal arm wheel  
\- \*\*SKU and product number:\*\* MX300

This component is intended for repair or replacement use. Replacing a damaged or worn part can help you return the machine to service without replacing the entire elliptical. It may also help maintain the correct movement of the left-side arm and pedal assembly when the original part no longer functions as expected.

The product page does not specify the material, color, dimensions, package quantity, or installation hardware. Confirm these details if they are important for your repair before ordering.

## Compatibility and Applications

The Precor EFX 576i, 556i, 546i Left Stair Arm Pedal Arm Wheel is listed for use with the following Precor elliptical models:

\- Precor EFX 576i  
\- Precor EFX 556i  
\- Precor EFX 546i

This part is intended for the \*\*left side\*\* of the compatible elliptical. It is not identified as a right-side component. Use it for repairs involving the left stair arm, left pedal arm, or related wheel connection on the listed EFX models.

Because elliptical parts can vary by model and production version, compare the existing component with the product title and verify your machine model before purchase. If your equipment has a serial number or other identification label, use that information when confirming compatibility. The product source includes the serial number \*\*AA72G09070061\*\*, but it does not state whether that serial number applies to every compatible machine or to a specific unit.

\### Why Choose This Replacement Part

The MX300 part gives you a clearly identified replacement option for a Precor EFX elliptical repair. Choosing the correct left-side component can make it easier to address a problem with the pedal arm or stair arm assembly while avoiding unnecessary replacement of larger machine components. It suits owners, fitness equipment technicians, gyms, and service departments working on Precor EFX 576i, 556i, or 546i machines.

## Before You Buy

Verify that your elliptical is a \*\*Precor EFX 576i, EFX 556i, or EFX 546i\*\* and that you need the \*\*left\*\* stair arm pedal arm wheel. Confirm the part number \*\*MX300\*\* against your repair records or existing component when possible. The listing does not provide dimensions, material details, warranty information, or installation instructions.

## Details

- **Price:** 139.99 USD
- **Vendor:** Precor
- **Type:** Miscellaneous
- **Tags:** All

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 139.99 USD | In stock |

## Images

- MX300
- MX300
- MX300
- MX300
- MX300
- MX300

## Additional Information

- **Condition:** PREOWNED

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> Source: [Cardio Equipment Parts](https://www.cardioequipmentparts.com/products/precor-efx-576i-556i-546i-elliptical-left-stair-arm-pedal-arm-wheel-mx300)
> Updated: 2026-08-29