Rear Shock Absorber for 2010-2024 Toyota 4Runner & More - KYB 5540040

Bring more damping control to the rear of your vehicle with the KYB Gas-a-Just shock absorber 5540040, a high-pressure monotube gas shock built as a direct-fit rear replacement for the 2010-2024 Toyota 4Runner, 2010-2014 Toyota FJ Cruiser and 2010-2014 Lexus GX460. KYB designs its components and valving specifically for these Toyota and Lexus vehicles, and this unit adds up to 25% more damping performance than original equipment shocks.

KYB builds the Gas-a-Just monotube with added performance advantages over the traditional twin-tube design. It uses two separate working chambers. One is an air-free hydraulic piston and valve area for responsiveness and control. The other holds high-pressure nitrogen gas behind a floating piston, which is designed to give a comfortable ride in normal driving and extra control on demand. Keeping the gas and oil apart is intended to prevent fade from aeration.

• High gas pressure: Responds quickly to help improve steering response.
• Extra damping for hard use: The added damping over the OE design is aimed at vehicles that work, tow or run larger, heavier tires and wheels.
• Triple chrome-plated piston rod: The ultra-smooth rod helps reduce seal wear. Fluid leaking can be a cause of shock failure.
• Electronic safety support: Electronic safety systems depend on the suspension, brakes and tires working as the automaker intended, and the Gas-a-Just helps keep those systems performing as designed.

If a leaking or worn shock absorber is behind a loose, bouncy rear end, this unit replaces it. Replacing both rear shocks together is recommended for balanced handling. See the "Vehicles it fits" section for engine details and the full application list.

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