KYB SM5381 Suspension Shock Mounting Kit - Rear Upper

KYB SM5381 Rear Upper Strut Mount

KYB SM5381 is a suspension shock absorber mounting kit for rear upper applications on select Nissan Maxima and Nissan Altima models. It replaces worn strut mount components that can transmit vibration, noise, and harshness into the cabin while helping restore suspension feel.

Key Features

• OE-quality replacement strut mount designed for the specific 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 proper component fitment
• Built to cushion road impacts and reduce jarring from worn mounts

Product Details

KYB Mount Components are engineered to replace hardened vibration insulators with a direct-fit solution that supports suspension performance. The SM5381 is part of KYB’s Mount Components line, which focuses on restoring the function of the strut mount and bearing interface rather than masking wear symptoms. For drivers searching for a rear upper strut mount for Nissan Maxima or Nissan Altima, KYB SM5381 provides an OE-style replacement built around the original application requirements. This part cross-references Monroe Shocks & Struts (e.g., 904985) for the same application.

What It Helps Address

• Clunking or rattling from worn rear upper mount components
• Excess cabin vibration from hardened rubber insulators
• Harsh impact transfer over bumps and rough pavement
• Reduced steering smoothness caused by worn mount bearings
• Front-end alignment issues related to mount wear

Installation Notes and Tips

Fits 2016-2023 Nissan Maxima, Rear Upper. Fits 2004-2014 Nissan Maxima, Rear Upper. Fits 2002-2018 Nissan Altima, Rear Upper. Verify the vehicle year, model, and rear upper position before installation. Inspect surrounding suspension components for wear and replace damaged parts as needed to complete the repair correctly. KYB SM5381 is a direct replacement for the listed applications and should be installed according to factory service procedures.

Quality Assurance

KYB is known for OE-quality suspension replacement components, and the SM5381 is built to meet the application-specific requirements of the listed Nissan Maxima and Nissan Altima fitments. The design focuses on restoring mount function, reducing noise and vibration, and supporting consistent suspension performance.