---
product_id: 210199253
title: "DEF Idle Air Control Valve Motor IAC Replace Sierra 18-7701 862998 Fits for MerCruiser ECM 555 2001, Set of 2"
brand: "def"
price: "¥22391"
currency: JPY
in_stock: true
reviews_count: 5
url: https://www.desertcart.jp/products/210199253-def-idle-air-control-valve-motor-iac-replace-sierra-18
store_origin: JP
region: Japan
---

# Set of 2 for value Fits multiple MerCruiser models High-quality replacement DEF Idle Air Control Valve Motor IAC Replace Sierra 18-7701 862998 Fits for MerCruiser ECM 555 2001, Set of 2

**Brand:** def
**Price:** ¥22391
**Availability:** ✅ In Stock

## Summary

> 🚤 Elevate Your Marine Experience with Precision Control!

## Quick Answers

- **What is this?** DEF Idle Air Control Valve Motor IAC Replace Sierra 18-7701 862998 Fits for MerCruiser ECM 555 2001, Set of 2 by def
- **How much does it cost?** ¥22391 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/210199253-def-idle-air-control-valve-motor-iac-replace-sierra-18)

## Best For

- def enthusiasts

## Why This Product

- Trusted def brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Value Pack:** Includes two valves for your convenience.
- • **Easy Installation:** No batteries required, plug and play design.
- • **Durable Construction:** Built to withstand marine environments.
- • **Precision Engineering:** Crafted for optimal performance and longevity.
- • **Universal Compatibility:** Seamlessly fits a range of MerCruiser engines.

## Overview

The DEF Idle Air Control Valve Motor IAC is a high-quality replacement part designed for MerCruiser ECM 555 engines from 2001 and newer. This set of two valves ensures optimal performance across various engine models, including 4.3L to 8.2L configurations. With easy installation and durable construction, it's the perfect upgrade for any marine enthusiast.

## Description

DEF Idle Air Control Valve Motor IAC Replace Sierra 18-7701 862998 Fits for MerCruiser ECM 555 2001, Set of 2

## Features

- High quality and brand new
- Idle Air Control replace Mercruiser 862998, Sierra 18-7701
- Fits for MerCruiser ECM 555 2001 and newer
- Fits for 4.3L Alpha/Bravo, 5.0L, 5.0LX, 5.7L, 350 MAG, 5.7L Alpha/Bravo EFI, 454 MAG MPI, 502 MAG MPI, 7.4L MPI MIE. 8.2L MIE MPI
- 2x Idle Air Control Valve with Gasket

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | DEF |
| Part Number | TL25-2998-2 |
| Item Weight | 1.5 pounds |
| Package Dimensions | 13.39 x 8.78 x 5.08 inches |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![DEF Idle Air Control Valve Motor IAC Replace Sierra 18-7701 862998 Fits for MerCruiser ECM 555 2001, Set of 2 - Image 1](https://m.media-amazon.com/images/I/51ksYwVmZLL.jpg)
![DEF Idle Air Control Valve Motor IAC Replace Sierra 18-7701 862998 Fits for MerCruiser ECM 555 2001, Set of 2 - Image 2](https://m.media-amazon.com/images/I/61-FuYkDvJL.jpg)
![DEF Idle Air Control Valve Motor IAC Replace Sierra 18-7701 862998 Fits for MerCruiser ECM 555 2001, Set of 2 - Image 3](https://m.media-amazon.com/images/I/71EbiU4DC6L.jpg)
![DEF Idle Air Control Valve Motor IAC Replace Sierra 18-7701 862998 Fits for MerCruiser ECM 555 2001, Set of 2 - Image 4](https://m.media-amazon.com/images/I/61LbZxBnBhL.jpg)
![DEF Idle Air Control Valve Motor IAC Replace Sierra 18-7701 862998 Fits for MerCruiser ECM 555 2001, Set of 2 - Image 5](https://m.media-amazon.com/images/I/61UAFuHR1RL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Worked great
  

*by D***E on Reviewed in the United States on September 23, 2023*

Got a IAC output low warning on my 496HO inboard while underway. Once back to the dock, found the old one actually melting and stuck closed. Replaced both engine Idle Air Control valves with these. Alarm went away and  engines idle beautifully at 700 rpm. Took 15 minutes to change both.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Mercruiser 5.0 MPI
  

*by J***R on Reviewed in the United States on July 20, 2023*

If you have a Mercruiser 5.0 MPI or similar engine you should keep a spare IAC on hand.  These IAC valves can fail quickly and leave you stranded.  It takes about 2 minutes to change one with and allen wrench.  Happened to me twice.

### ⭐ 1.0 out of 5 stars







  
  
    Dont work correctly
  

*by S***G on Reviewed in the United States on July 26, 2023*

I purchased two of these. Neither one worked correctly.  One had the idle too high, 850 instead of 650, and the other one had the idle rev up and down from 250rpm to 500 rpm.  Sent them both back.

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**Shop now:** [https://www.desertcart.jp/products/210199253-def-idle-air-control-valve-motor-iac-replace-sierra-18](https://www.desertcart.jp/products/210199253-def-idle-air-control-valve-motor-iac-replace-sierra-18)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-17*