KYB SR4458 Suspension Strut and Coil Spring Assembly - Front Left

KYB Strut-Plus SR4458 for Mazda 3

The KYB Strut-Plus SR4458 is a front left suspension strut and coil spring assembly for 2010-2013 Mazda 3 models. It combines OE-style ride height restoration with application-specific damping to help return steering response, stability, and ride control to factory-like behavior.

Built around KYB’s Strut-Plus platform, this assembly is pre-engineered for exact fitment and assembled in the USA for professional replacement work on the Mazda 3 front suspension.

Key Features

• Fits 2010-2013 Mazda 3, front left
• Includes a KYB Excel-G strut with application-specific precision damping valves
• Uses a stronger steel outer shell for added structural support
• High-carbon steel coil spring is selected to restore ride height within OE specifications
• Side-specific design with left and right part numbers, as the vehicle manufacturer intended
• Engineered to support vehicles equipped with electronic safety systems such as ESC and ABS
• Exact-fit, pre-assembled design for professional installation results
• Recipient of a 2018 industry award in the import aftermarket category

Product Details

KYB is an original equipment supplier, and the Strut-Plus line is built to restore handling and control characteristics on vehicles that rely on a complete strut and spring assembly. For the Mazda 3, part number SR4458 combines the strut, spring, and side-specific configuration into one front left assembly that matches the vehicle’s original suspension layout. If you are replacing a worn front strut on a 2010-2013 Mazda 3, SR4458 provides a direct-fit solution designed around OE ride height and steering pivot function.

The Strut-Plus product line focuses on restoring the suspension geometry and damping behavior that affect ride quality, cornering stability, and electronic chassis systems. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Problems This Assembly Can Address

• Front-end bounce, harshness, or reduced damping control
• Uneven or sagging ride height at the front left corner
• Noisy or worn strut assembly behavior during steering and braking
• Loss of stability, body control, or predictable handling on the Mazda 3
• Suspension wear that can affect ESC, ABS, and related electronic systems

Installation Notes and Tips

Fits 2010-2013 Mazda 3, front left. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Because this is a side-specific assembly, confirm left-side placement before installation. After replacement, a professional wheel alignment is recommended to verify suspension geometry and steering response.

Quality Assurance

KYB supplies original equipment components and engineers the Strut-Plus line to restore factory-style ride, handling, and performance characteristics. Part number SR4458 is assembled in the USA and built with OE-focused fitment and damping design for the Mazda 3 front suspension.