KAX Rear Struts Fit for Expedition Navigator 2007-2017 - Quick

In this review the KAX rear struts assembly is evaluated as a direct replacement for Ford Expedition and Lincoln Navigator models from 2007 through 2017. The bottom line: this complete rear strut pair is aimed at owners who want a ready-to-install solution that restores handling and braking confidence without the extra time or tools of piecemeal replacements. The reviewer found the assemblies saved installation time, produced noticeable reduction in body bounce, and delivered the expected fit and function for a practical, value-focused repair.

Key Features

• Vehicle specific fit: Designed for Expedition and Navigator rear left and right, the assemblies match the listed model years to simplify parts selection and ensure correct mounting.
• Complete ready-to-install assembly: Each strut arrives with the components needed for replacement, so no spring compressor is required and installation time is reduced.
• Brake and handling recovery: Replacing worn struts is said to shorten stopping distance and improve steering response, helping restore pre-wear safety margins.
• Improved ride control: Damping rods and fluid flow design reduce body vibration and wheel bounce, which helps stabilize the vehicle over rough surfaces.
• Increased tire contact: Stiffer spring characteristic reduces rapid wheel vibration so tires maintain road contact more consistently for better grip.

Who It's For

The KAX rear struts assembly is best for DIY mechanics and independent shops working on late model Ford Expedition and Lincoln Navigator vehicles who want a time-saving, complete swap without needing a spring compressor. It also suits owners who are restoring handling and braking performance after noticeable sagging or increased stopping distance.

It is less appropriate for drivers who need factory-branded components for warranty reasons or those requiring adjustable performance suspension; this kit is a direct, cost-conscious replacement focused on restoring original function rather than offering custom tuning.

Pros & Cons

Pros

• Complete assembly minimizes installation time and removes the need for a spring compressor.
• Customers report a reliable fit and solid functionality on the specified vehicle years.
• Designed to reduce bounce and improve steering feel, which can shorten braking distance.
• Good value for money compared with buying separate components and paying extra labor.

Cons

• Not intended as a performance upgrade; those seeking adjustable or performance struts should look elsewhere.
• Limited to the specified years and rear application, so buyers must confirm exact fitment before purchase.

Specifications

Brand	KAX
Application	Expedition / Navigator rear struts, left and right
Fitment years	2007-2017
Part numbers	171139, SR4515, ST8599, 181139 (full set of 2)
Assembly type	Complete strut assembly, ready to install
Installation	No spring compressor required

Our Verdict

The KAX rear struts assembly is a smart, value-oriented choice for owners of Expedition and Navigator models from 2007 to 2017 who want a straightforward replacement that restores handling and braking confidence. It offers a correct-fit, ready-to-install solution that reduces workshop time and delivers the practical benefits most drivers need without upselling performance features.

Frequently Asked Questions

Will these struts fit my 2014 Expedition?
Yes, the assemblies are listed for 2007 through 2017 rear fitment; verify left/right application and vehicle suspension options before ordering.

Do I need a spring compressor to install these?
No, the complete assembly is shipped ready to install so a spring compressor is not required.

Will replacing these improve braking and steering feel?
Replacing worn struts typically shortens stopping distance and improves steering response, and customers report noticeable improvements after installation.