KYB SM5808 Coil Spring Insulator - Front Lower

KYB SM5808 Coil Spring Insulator Overview

KYB SM5808 is a suspension mount component engineered to replace worn vibration insulators that can transmit road noise and harshness into the cabin. Built for front lower applications, it supports smoother suspension operation on select Toyota, Lexus, and Pontiac vehicles.

Compatible with 2003-2013 Toyota Corolla, front lower; 2003-2013 Toyota Matrix, front lower; 2003-2010 Pontiac Vibe, front lower; 2001-2009 Toyota Prius, front lower; and 1990-1991 Lexus ES250, front lower.

Key Features

• OE-quality replacement strut mount component for the specified application
• Superior rubber helps reduce noise, vibration, and harshness
• Mount bearings support smoother steering response and front-end alignment retention
• Matched-grade studs and nuts for application-specific serviceability
• Designed to restore suspension feel on worn front lower mount components

Product Details

KYB Mount Components are built around application-specific OE replacement standards, with the goal of restoring the original suspension feel rather than masking wear. On vehicles such as the Toyota Corolla, Toyota Matrix, and Toyota Prius, a worn mount or insulator can allow excess vibration to pass through the chassis and can contribute to steering looseness or uneven front-end behavior. The KYB SM5808 addresses those issues with rubber and bearing materials selected for the listed fitments. This part cross-references Monroe Shocks & Struts 906936 for the same application.

Common Issues This Part Can Address

• Excess cabin vibration from hardened or deteriorated mount material
• Suspension noise over bumps and rough pavement
• Harsh steering feel caused by worn mount bearings
• Front-end alignment instability related to mount wear
• Reduced ride quality from aged suspension support components

Installation Notes and Tips

Verify the vehicle’s year, make, model, and front lower position before ordering. Inspect the surrounding strut and suspension hardware for wear before installation, and replace any damaged related components as needed. After installation, a professional wheel alignment is recommended to confirm steering geometry and front-end settings.

Quality Assurance

KYB Mount Components are built as OE-quality replacement parts for application-specific suspension service. KYB’s mount and bearing plate designs are used to help maintain steering performance and reduce the vibration transfer associated with worn original components. KYB SM5808 is intended for direct replacement use on the listed vehicles.