Ford F-150 IWE Combo Kit FL3Z-3A788-B + 7L1Z-9H465-B | 4WD Check Valve & Solenoid 2015–2020 + Install Video

Ford F-150 IWE Complete Fix Kit — FL3Z-3A788-B Check Valve + 7L1Z-9H465-B Solenoid

Fix your Ford F-150's 4WD grinding noise once and for all with this complete OEM IWE repair kit. This kit includes both the vacuum check valve and the vacuum solenoid — the two most common causes of 4WD hub grinding and rattling on 2015–2020 Ford F-150, Expedition, and Lincoln Navigator.

🎥 FREE Step-by-Step Installation Video Included
Every order includes access to our exclusive install video guide covering both components, so you can complete the repair quickly and confidently without a mechanic.

What's Included
- 1 x Ford OEM IWE Check Valve (FL3Z-3A788-B) 
Replacements: FL3Z-3A788-A, 926-390, FL34-7A788-AD
- 1 x Ford OEM Vacuum Solenoid (7L1Z-9H465-B) 
Replacements: 9L14-9H465-BA, 6L3Z-9H465-B, 9L14-9H465-BB
- 🎥 Access to installation video guide

Key Features
- Complete OEM IWE repair kit — both components in one order
- Fixes grinding, growing, and rattling from front wheels in 2WD mode
- Restores proper vacuum pressure for 4WD hub engagement/disengagement
- Direct-fit OEM replacement — plug and play, no modifications needed
- Replacing both parts together eliminates air leaks from poor connections
- Free installation video guide included

Symptoms This Kit Fixes
- Grinding or growing from front wheels in 2WD mode
- 4WD hub not fully disengaging in 2WD
- Rattling noise from front axle area
- Noise that disappears when engaging 4WD

Vehicle Compatibility (4WD models only)
- 2015–2020 Ford F-150 4WD (All Trims)
- 2018–2020 Ford Expedition 4WD
- 2018–2020 Lincoln Navigator 4WD

Please note: For 4WD equipped vehicles only.

Why Choose SayParts?
We include a free install video with every order so you can get the job done right the first time. Genuine OEM parts, fast US shipping, and real support when you need it.

✅ OEM Kit | 📦 Fast US Shipping | 🎥 Free Install Video | 💰 Save vs Buying Separately