KYB 551126 front right suspension strut assembly for the 2006-2013 Lexus IS250 and other vehicles is a high-pressure monotube gas strut that controls suspension movement. The Gas-a-just is available as an OE monotube replacement meant to restore your vehicle's original capabilities.
- KYB Gas-a-Just monotube design with an air-free hydraulic piston and valve area plus a high-pressure nitrogen gas area with a floating piston
- Ultra-smooth triple chrome plated piston rod to reduce seal wear
- Higher gas pressure for quick response that improves steering response
- Helps keep electronic safety systems performing as designed
- Made for work, towing and larger, heavier tires and wheels
- Gas and oil are separated for fade-free operation and instant response
Quick facts
- Part: KYB 551126 suspension strut assembly
- Fits: 2006-2013 Lexus IS250 and other vehicles
- Position: Front right
- Condition: New
Fluid on the strut body, a bouncy ride or clunks over bumps can mean a strut is wearing out. A worn sway bar link can make similar noises, so these signs alone do not prove the strut is the problem. If this strut is the cause, this one replaces the front right.
Fits
This strut is a direct-fit replacement for the 2006-2013 Lexus IS250 and the 2011-2013 Lexus IS350, where it helps restore the designed control and handling.
Specifications
Fit and size
- Position: Front right
- Quantity for this side: 1
Build and materials
- Type: high-pressure monotube gas strut
- Gas area: nitrogen, with a floating piston
- Piston rod: triple chrome plated
- Condition: New
In the box
One front right suspension strut assembly. The front right takes one; the front left is a separate part ordered on its own, and the two sides are normally replaced together.
Interchange: 4851080259 · 39131 · 39138
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Does the KYB front strut assembly fit the 2011-2013 Lexus IS350?
Yes. KYB 551126 is the front right strut for the 2011-2013 Lexus IS350 and the 2006-2013 Lexus IS250; the front left is a separate part.
Is this KYB strut assembly gas-charged or oil-only?
KYB 551126 is a high-pressure monotube gas strut. A nitrogen gas area with a floating piston sits apart from the hydraulic piston and valve area, so gas and oil stay separate.
What kind of piston rod does the KYB suspension strut have?
The piston rod is ultra-smooth and triple chrome plated, which reduces seal wear. This matters because leaking fluid can be a cause of strut failure.
How can I tell if a KYB suspension strut assembly is worn?
Oil on the strut body is a visible sign, and a bouncy ride or clunks over bumps are what you notice while driving. A shop can confirm whether the strut is worn.
Does the KYB 551126 replace the 39138 strut?
Yes. 39138 is one of the numbers KYB 551126 replaces, along with 39131 and 4851080259.
