KYB Suspension Shock Absorber P/N:554351

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$88.99
MPN: 554351
UPC: 781552502661
Item Package Quantity: 1
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KYB Suspension Shock Absorber P/N:554351
KYB Suspension Shock Absorber P/N:554351
$88.99

Keep your Tacoma's rear suspension planted and fade-free with the KYB Gas-a-just High Pressure Monotube Gas Shock (MPN 554351), a rear-position shock absorber that drops in as a direct-fit replacement for the 2005-2015 Toyota Tacoma. KYB built its components and valving specifically for Toyota Tacomas, so it damps the way this truck's rear suspension is meant to.

  • Monotube gas design: 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 for a comfortable ride during normal driving and instant performance on demand.
  • Fade-free operation: The high-pressure monotube design separates the gas and oil, so it resists fade from aeration and reacts quickly.
  • Triple chrome-plated piston rod: An ultra-smooth rod helps reduce seal wear, since fluid leaking can be a cause of shock failure.
  • Extra damping capacity: Adds up to 25% more damping performance over original equipment shocks and adds damping over OE design for trucks that work, tow, and run larger, heavier tires and wheels.

Higher gas pressure responds quickly to improve steering response, and KYB designed the Gas-a-just to help keep Electronic Safety Systems performing as intended. Signs your rear shocks may need replacing include excessive bouncing, fluid leaks, and reduced ride control.

Interchange: G63889 · 37279 · 48530A9330 · 4854009530

This part cross-references / interchanges with the following part numbers:

G63889, 37279, 48530A9330, 4854009530

Frequently Asked Questions

What vehicle does this KYB shock fit?

It is a direct-fit rear shock absorber for the 2005-2015 Toyota Tacoma, with components and valving KYB designed specifically for Toyota Tacomas. See the Buyer's Guide tab to confirm your truck.

Is this a front or rear shock?

This is a rear-position shock absorber. It is sold individually; replacing both rear shocks together as a matched pair is recommended for balanced ride control.

What makes the Gas-a-just monotube different from a twin-tube shock?

It uses two separate chambers — an air-free hydraulic piston and valve area, plus a high-pressure nitrogen gas area with a floating piston — and separates gas from oil for fade-free operation and instant response.

Why does the piston rod have a triple chrome-plated finish?

The ultra-smooth triple chrome-plated rod helps reduce seal wear. Since fluid leaking can be a cause of shock failure, reducing seal wear supports longer service.

What are signs my rear shocks may need replacing?

Common signs include excessive bouncing over bumps, reduced ride control, uneven tire wear, and visible fluid leaking from the shock. Diagnose the cause before replacing.