KYB SM5856 Coil Spring Insulator - Front Lower

KYB SM5856 Front Lower Mount Component

KYB SM5856 is a front lower suspension mount component engineered for OE-style replacement on select Buick Lucerne and Cadillac DTS applications. It is built to reduce vibration, noise, and harshness from worn vibration insulators while helping restore stable suspension feel.

Key Features

• OE-quality replacement strut mount component for application-specific fitment
• Superior rubber construction helps reduce noise, vibration, and harshness
• Mount bearing design supports smoother steering response and front-end alignment retention
• Helps cushion road impacts that old mounts can transmit into the cabin
• Matched-grade studs and nuts for proper component integration

Product Details

KYB Mount Components are designed around the original suspension layout for the vehicle, with the goal of restoring the function of the front mount assembly after the original insulator hardens or wears out. On the 2006-2011 Buick Lucerne and 2006-2011 Cadillac DTS, front lower mount wear can contribute to clunks, vibration, and steering feel changes. KYB SM5856 addresses those symptoms with a replacement component built to support suspension performance and steering precision. KYB SM5856 is a direct-fit suspension service part for front lower applications on these vehicles.

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

Common Problems It Can Help Solve

• Front suspension noise over bumps or rough pavement
• Excess vibration transferred into the cabin
• Harsh ride feel from hardened mount material
• Loose or imprecise steering response from worn mount bearings
• Front-end alignment concerns related to mount wear

Installation Notes and Tips

Fits 2006-2011 Buick Lucerne, Front Lower. Fits 2006-2011 Cadillac DTS, Front Lower, excluding electronic suspension models. Inspect the surrounding strut and suspension hardware during service, and verify the mount orientation before final assembly. Professional installation is recommended for proper suspension performance and alignment results.

Quality Assurance

KYB is known for OE-focused suspension components, and the SM5856 follows that approach with application-specific design and materials selected to restore factory-style function. The part number SM5856 is intended for buyers seeking a front lower mount component that matches the vehicle’s original suspension requirements.