KYB 551124 Suspension Strut - Rear Left

KYB Gas-a-just Rear Left Strut for Lexus LS460

The KYB Gas-a-just 551124 is a monotube suspension strut built as an OE-style replacement for the rear left position on select Lexus LS460 models. It is designed to restore original ride control, steering response, and suspension consistency on vehicles that see daily driving, heavier wheel setups, or added load demands.

Key Features

• Monotube OEM replacement for the correct rear left suspension position
• Fits 2007-2017 Lexus LS460, rear left, w/o air suspension
• Separate gas and oil chambers for consistent damping and quick response
• High-pressure nitrogen gas design helps maintain fade-free operation
• Triple chrome plated piston rod helps reduce seal wear from fluid leakage
• Built to support improved steering response and controlled handling
• Part number 551124 from KYB Gas-a-just

Product Details

KYB Gas-a-just struts use a monotube layout with an air-free hydraulic working area and a separate high-pressure nitrogen gas chamber. That design helps the strut react quickly to suspension movement while maintaining stable control during normal driving. For Lexus LS460 rear suspension service, this KYB 551124 strut is a direct-fit OE replacement choice for vehicles without air suspension.

The Gas-a-just line is aimed at vehicles that work harder than average, including those used for towing or equipped with larger, heavier tires and wheels. On the Lexus LS460, it helps restore the designed balance between comfort and control while supporting the electronic safety systems that rely on the suspension, brakes, and tires operating as intended. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Problems This Strut Can Address

• Excessive bouncing or reduced damping at the rear left corner
• Loose or delayed steering response caused by worn suspension control
• Uneven ride quality after shock or strut wear
• Fluid leakage related to piston rod seal wear
• Loss of stability on a Lexus LS460 with heavier wheels or added load

Installation Notes

Verify that the vehicle is a 2007-2017 Lexus LS460 with no air suspension before ordering. Confirm the rear left position and match the mounting dimensions: compressed length 19.19 in., extended length 27.04 in., and stroke length 7.85 in. The upper mount uses 12x1.25 and the lower mount type is E2(14.2/17.7x40). Inspect related suspension components, mounting points, and alignment settings during replacement.

Quality Assurance

KYB is known for OE replacement suspension components, and the Gas-a-just design is engineered to restore factory-style control and handling characteristics on the Lexus LS460. Part number 551124 is built as a monotube strut for consistent performance and responsive damping.