KYB SR4451 Suspension Strut and Coil Spring Assembly - Front Left

KYB Strut-Plus for Toyota Highlander

The KYB Strut-Plus SR4451 is a front left suspension strut and coil spring assembly for select Toyota Highlander models. It is built to restore OE ride height, steering response, and vehicle control with a pre-assembled design that matches the original suspension layout.

For 2008-2010 Toyota Highlander front left applications, this assembly combines KYB damping technology with a vehicle-specific coil spring to help return the suspension to factory specifications. The SR4451 is a direct-fit solution for drivers replacing a worn strut and spring assembly on the Toyota Highlander.

Key Features

• OE-style replacement for Asian vehicles
• Includes a KYB Excel-G strut with application-specific damping valves
• Stronger steel outer shell for added structural support
• Pre-assembled for exact fitment and professional installation results
• Side-specific left and right design follows the vehicle manufacturer’s original layout
• Engineered to work with electronic safety systems such as ESC and ABS
• Recognized with a 2018 import aftermarket industry award

Product Details

KYB Strut-Plus is the brand’s complete strut and spring assembly line, developed to restore handling and control without requiring the installer to build the unit from separate components. KYB uses an OE-restoring strut design and a high-carbon steel coil spring selected for the vehicle’s weight and corner loading, helping maintain the intended ride height. This makes the SR4451 a practical choice for Toyota Highlander front suspension service where factory ride quality and steering feel matter.

This part cross-references Monroe Shocks & Struts 172484 for the same application.

Common Problems This Part Can Address

• Front-end bounce or excessive road movement
• Uneven ride height at the front left corner
• Clunking or worn suspension feel from a fatigued strut assembly
• Reduced steering stability and response
• Suspension wear affecting ESC or ABS system behavior

Installation Notes

Fits 2010 Toyota Highlander, front left. Fits 2008-2009 Toyota Highlander, front left. Follow the manufacturer’s instructions for suspension replacement and verify side-specific placement before installation. Because this is a pre-assembled strut and coil spring assembly, it is intended to simplify replacement of the original front left unit on the Toyota Highlander.

Quality Assurance

KYB is an original equipment supplier, and the Strut-Plus line is engineered to restore OE-level ride height, handling, and control characteristics. The SR4451 is built around KYB’s OE-restoring strut design and vehicle-specific spring selection for consistent fit and function.