Warranty & Shipping
How-To & Tools
Product Reviews
Vehicle Fit

This 4X4 Engage Solenoid is just what you need to get your four wheel drive system working again! The factory solenoids commonly fail due to cracking and leaking, resulting in failure of the four wheel drive system.


  • Controls 4X4 engagement
  • Correct electrical connections
  • Durable construction
  • Direct bolt on replacement
  • Built to strict quality control standards

Note: There are two solenoids located side by side in the housing; engagement & disengagement. The simple way to know which is which is the key way location: holding the solenoid with the connector at the top and vacuum lines on the bottom, the engagement solenoid key way will be at the 9 o'clock position (to the left), the disengagement solenoid key way will be at the 6 o'clock position (bottom).

If one of the two solenoids fail, the 4 wheel drive system will be inoperative. Both solenoids must be functioning properly for the system to operate.

Our electrical and electronic parts are subject to strict quality control testing. Please ensure proper diagnosis of this item before purchasing as the item cannot be returned once installed or plugged in.

Item Condition: New

Attention California Customers:

WARNING: Cancer and Reproductive Harm -

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Removing the Axle Actuator Solenoid (0:41)
    • Unclip the solenoid from the firewall with a flat blade screwdriver
    • Pull the vacuum hoses off the solenoid by hand
    • Disconnect the solenoid wiring harness
  2. step : Connecting the New Axle Actuator Solenoid (1:05)
    • Push the vacuum hoses onto the new solenoid
    • Clip the solenoid to the firewall
    • Connect the solenoid wiring harness

Tools needed for replacement:

    Screwdrivers & Related

  • Flat Blade Screwdriver

5.00/ 5.0
2 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Quick Service
Received the part sooner that anticipated. It was packaged properly and installed it in my truck. thank You Again!!
December 11, 2017
solenoids for Ford Expedition 4x4
Fast delivery, parts were exactly as ordered, And at a GREAT price!!! I highly recommend A1 Auto parts and supplies for your needs!
March 26, 2018
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
Will this cause the 4x4 dash light not to turn on to 4high or 4 low?
Nehemias N January 5, 2016
Hello, If your 4WD is not engaging, it may be related. If your 4WD is working fine, then the issue is related to a switch on the transfer case.
Brian F January 6, 2016
I have the same problem, dash light is on, but 4X4 dont engage !! 04 ford F150
Horacio M December 10, 2018
I’m a little confused, the description where it tells you how to tell which is the engagement and disengagement solenoid it says the engagement is at 9’o clock (left) and the disengagement is at the 6’o clock (bottom) they are side my side wouldn’t one be on the left and the other on the right? I’m just confused on what’s on the “bottom�
Jason C November 7, 2017
The 2 ports on the bottom are for the vacuum lines. My truck only has one solenoid. My advice to you would be look at how yours is hooked up and take a picture of it and when you install the new solenoid or solenoids depending on your vehicle hook everything up like it was. Hope that helps
Jason R November 8, 2017
Year Make Model Description
1997-2006Ford Expedition Ford Expedition 4 Wheel Drive Engage Solenoid
1995-1996Ford Explorer Ford Explorer 4 Wheel Drive Engage Solenoid
2004Ford F150 Heritage Truck Ford F150 Heritage Truck 4 Wheel Drive Engage Solenoid
1997-2003Ford F150 Truck Ford F150 Truck 4 Wheel Drive Engage Solenoid
1997-1999Ford F250 Light Duty Truck Ford F250 Light Duty Truck 4 Wheel Drive Engage Solenoid
2006-2008Lincoln Mark LT Lincoln Mark LT 4 Wheel Drive Engage Solenoid
1998-2006Lincoln Navigator Lincoln Navigator 4 Wheel Drive Engage Solenoid
Part #: 1AEIX00005

Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(02:04 min)