# Precor 9.31 9.33 9.35 Treadmill Rear Back Plastic End Cap (EC307)

\## Precor Treadmill Rear Back Plastic End Cap EC307

The Precor 9.31, 9.33, 9.35 Treadmill Rear Back Plastic End Cap is a preowned replacement plastic part for the rear section of compatible Precor treadmills. It replaces a missing, cracked, damaged, or worn rear back end cap and helps restore the finished appearance of the machine. This part is identified by SKU EC307 and Precor part number 35689-101.

## Product Details and Benefits

This component is a rear back plastic end cap designed for use on specific Precor treadmill models. Its position at the back of the treadmill makes it an important exterior cover piece. A properly matched end cap can help complete the treadmill’s outer housing and provide a cleaner, more finished appearance than leaving the original part missing or damaged.

The product is made from plastic, as identified in the product listing, and is sold in preowned condition. Because this is a used replacement part, the item may show signs of previous use. Buyers should review the product photographs and condition details carefully before ordering.

Product information:

\- \*\*Product:\*\* Rear back plastic end cap  
\- \*\*Brand:\*\* Precor  
\- \*\*Compatible models:\*\* Precor 9.31, 9.33, and 9.35 treadmills  
\- \*\*Part number:\*\* 35689-101  
\- \*\*SKU:\*\* EC307  
\- \*\*Condition:\*\* Preowned  
\- \*\*Category:\*\* Plastic Parts  
\- \*\*Quantity:\*\* One listed end cap, unless the seller specifies otherwise

This part may suit treadmill owners, repair technicians, fitness equipment service businesses, and facilities maintaining older Precor machines. It can also help when an original rear cover component has been removed, lost, or damaged during transport, storage, or regular equipment use.

## Compatibility and Applications

The EC307 Precor treadmill rear back plastic end cap is listed for compatibility with the following treadmill models:

\- Precor 9.31  
\- Precor 9.33  
\- Precor 9.35

It is intended for the rear back section of these Precor treadmill models. This is an exterior plastic part, not a motor, belt, electronic component, or treadmill performance part. Its purpose is to replace the corresponding rear end cap on a compatible machine.

Before ordering, compare the part number, model information, shape, mounting points, and product photos with the existing component. Precor equipment can vary by model and production version, so the treadmill model alone may not provide enough information to confirm a match.

\## Why Choose This Replacement Part

A matching replacement end cap can help maintain the appearance of an older Precor treadmill without replacing the entire machine. It may also provide a practical way to complete a repair when the original rear plastic piece is no longer usable. Since this item is preowned, it may offer a suitable option for repair projects where an original-style part is required.

## Before You Buy

Confirm that your treadmill is a Precor 9.31, 9.33, or 9.35 model and check for part number \*\*35689-101\*\* or SKU \*\*EC307\*\*. Compare the listing images with your existing rear back end cap before purchase. Dimensions, mounting hardware, installation instructions, warranty information, and additional materials are not provided in the product details, so contact the seller if you need those specifications.

## Details

- **Price:** 129.99 USD
- **Vendor:** Precor
- **Type:** Plastic Parts
- **Tags:** All

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 129.99 USD | In stock |

## Images

- EC307
- EC307
- EC307
- EC307
- EC307
- EC307
- EC307

## Additional Information

- **Condition:** PREOWNED

---

> Source: [Cardio Equipment Parts](https://www.cardioequipmentparts.com/products/precor-9-31-9-33-9-35-treadmill-rear-back-plastic-end-cap-ec307)
> Updated: 2026-08-29