KYB SR4780 Suspension Strut and Coil Spring Assembly - Front Left

KYB Strut-Plus SR4780 Front Left Assembly

KYB Strut-Plus SR4780 is a front left suspension strut and coil spring assembly for select Lexus and Toyota applications. It combines an OE-restoring KYB strut with a high carbon steel coil spring to help return ride height, handling, and steering response to factory specifications.

Compatible with 2018-2022 Toyota C-HR, front left, and 2019-2022 Lexus UX200 and Lexus UX250h, front left. This KYB Strut-Plus assembly is built for drivers replacing a worn front suspension unit on these vehicles.

Key Features

• Part number SR4780 for front left suspension service
• Strut and coil spring assembly for direct replacement of the original front corner unit
• OE-restoring KYB strut construction
• High carbon steel coil spring matched to vehicle attributes and corner weights
• Boot included
• Internal rebound spring included
• Compressed length: 14.52 in.
• Extended length: 18.49 in.
• Stroke length: 3.97 in.

Product Details

KYB Strut-Plus SR4780 is engineered as a complete front left suspension strut and coil spring assembly for the Toyota C-HR, Lexus UX200, and Lexus UX250h. As an original equipment supplier, KYB builds this assembly to restore ride height and bring back the handling and control characteristics expected from the factory suspension layout. The coil spring is selected to match vehicle-specific corner weights, helping keep the vehicle within OE ride-height specifications after replacement. Part number SR4780 is a practical choice when servicing the front suspension on these models.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues This Part Addresses

• Front-end sag or uneven ride height
• Excessive bounce or reduced damping control
• Noisy or worn front strut assembly
• Loose steering feel from a worn strut at the front left corner
• Loss of factory ride and handling balance after suspension wear

Installation Notes and Tips

Install SR4780 on the front left position only. Verify vehicle application by year, make, model, and side before installation, and inspect related suspension components such as mounts, bushings, and tires while the assembly is removed. Because this is a complete strut and spring assembly, it is suited to replacing the full front corner unit rather than rebuilding individual components.

Quality Assurance

KYB is an original equipment supplier, and the Strut-Plus line is built to restore factory ride height, handling, and control characteristics using OE-focused components and spring specifications.