KYB Suspension Shock Absorber P/N:3440163
Firm up a worn, bouncy rear ride with the KYB Gas-a-just 554386, a high-pressure monotube gas shock. This KYB shock absorber drops in as a direct-fit rear replacement for the 2008-2012 Ford Escape, 2008-2011 Mazda Tribute, and 2008-2011 Mercury Mariner.
Unlike a traditional twin-tube, the Gas-a-just uses two separate working chambers: an air-free hydraulic piston and valve area for responsiveness and control, plus a high-pressure nitrogen gas area with a floating piston that supports a comfortable ride during normal driving and adds performance on demand.
The correct monotube-designed OE replacement, it helps keep electronic safety systems performing as the manufacturer intended. Sold individually; order two to replace both rear corners as a matched pair.
Interchange: 9L8Z18125A · 9L8Z18125B · 9L8Z18125C · CL8Z18125A · CL8Z18125B · CL8Z18125C
This part cross-references / interchanges with the following part numbers:
Will this fit my vehicle?
It's a direct-fit rear replacement for the 2008-2012 Ford Escape, 2008-2011 Mazda Tribute, and 2008-2011 Mercury Mariner. Check the "Vehicles it fits" section for engine-level details.
Is this a front or rear shock?
It's a rear shock absorber. It's sold individually, so order two to replace both rear corners as a matched pair for balanced ride control.
What is a monotube gas shock?
A monotube design keeps a high-pressure nitrogen gas chamber and the oil separated by a floating piston, which resists fade from aeration and responds instantly.
What are signs my rear shocks may need replacing?
Excessive bouncing, nose dive, poor ride control, uneven tire wear, or fluid leaking from the shock body are common signs a shock may need replacing.
Is this Gas-a-just designed for towing?
Yes — KYB Gas-a-just monotubes are designed for vehicles that work, tow, and run larger, heavier tires and wheels, adding control on demand.
No reviews yet — be the first to review this product.
Write a ReviewWARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.