




🛠️ Upgrade your 4WD system with confidence—don’t let a faulty valve hold you back!
The Dorman 926-391 4WD Actuator Vacuum Check Valve is a direct-fit replacement part designed for select Ford and Lincoln models (2010-2017). Manufactured to precise OEM specifications, it restores proper vacuum levels essential for 4WD system performance. Built with durable materials and backed by over a century of automotive expertise, this valve ensures reliable, long-lasting operation. Confirm your vehicle’s compatibility using the included garage tool before purchase.





| Brand | Dorman |
| Item dimensions L x W x H | 8.85 x 3.15 x 3.15 inches |
| Exterior Finish | Ready To Paint If Needed |
| Inlet Connection Type | Compression |
| Number of Ports | 2 |
| Manufacturer | Dorman Products |
| UPC | 037495934152 |
| Model | Dorman 926-391 |
| Item Weight | 3.2 ounces |
| Product Dimensions | 8.85 x 3.15 x 3.15 inches |
| Item model number | 926-391 |
| Manufacturer Part Number | 926-391 |
| OEM Part Number | AL3Z3A788A; BL3Z3A788A |
E**R
Works as intended. Simple, Cheap and Effective
Figured before I take the front end apart on my truck to replace the auto locking hubs, I would buy this part and replace as a first step. Grinding noise went away and 4WD on my 2014 F150 works perfectly after 250 miles. For $17 and next day delivery it saved me hundreds of $$$ and possible trip to the Ford Stealership.
L**M
Perfect
Worked great
R**N
Good product
Nice product! Fixed our situation with tge front 4WD clicking in the hub of our 2015 Expedition. Should be easy to install for most people.
A**Y
Make and model of your vehicle
Work well on my 04 , F×4 , F150 with 5.4 engine
T**N
Vacuum line
Vacuum line itself is good super fast shipping g reasonable price only problem is value keeps coming apart most of time Dorman is good value on line is junk might have to put old value on did not fix grinding but did not think it would but I broke line on my truck so I still needed it
A**.
ORM Fit and Quality
Oem quality! These were super easy to install, and fit perfectly. Fixed the issue I was having with my 4WD. It got rid of the grinding noise from my 4WD staying engaged.
B**L
Poorly made
Went to pull the hose connection off and the valve split in half. Very poor quality. Spend the extra money and get the OEM since it’s not much more.
H**R
Super easy to replace and quick permanent fix
Product, fixed my chattering actuators. I had gone through a couple different sets of actuators, thinking I was buying crappy product and then tried Dorman actuators and was still getting the chattering. Figured I would give this a try and it fixed my issue instantly. Highly recommend this if yours are giving you trouble and you haven't tried replacing this part previously.
Trustpilot
3 days ago
1 month ago