Rear Shock Absorber for 2003-2009 Toyota 4Runner & More - KYB 5540041

Help restore the designed control and handling of your rear suspension with the KYB Gas-a-just 5540041, a high-pressure monotube gas shock that serves as a rear Toyota 4Runner shock absorber for 2003-2009 models and also fits the 2007-2009 Toyota FJ Cruiser. KYB describes it as the correct monotube-designed OE replacement. Engine details are in the Buyer's Guide tab.

A traditional twin-tube design is built differently. This monotube suspension shock absorber has two separate working chambers. The first is an air-free hydraulic piston and valve area for responsiveness and control. The second is a high-pressure nitrogen gas area with a floating piston, which supports a comfortable ride in normal driving and quick response on demand.

• Fade-free design: The high-pressure monotube layout keeps the gas and oil separate. It is designed to operate without fade from aeration and to respond instantly.
• Steering response: The higher gas pressure responds quickly to help improve steering response.
• Smooth piston rod: Leaking fluid can be one cause of shock failure. An ultra-smooth, triple chrome-plated piston rod helps reduce seal wear.
• Built for work: Gas-a-just monotubes are designed for vehicles that work, tow, and run larger, heavier tires and wheels.

Electronic safety systems rely on the suspension, brakes and tires operating as the vehicle manufacturer intended. The Gas-a-just is designed to help those systems perform as designed. Replacing both rear shocks together is recommended for balanced handling.

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