KYB SM5325 Suspension Shock Mounting Kit - Rear Upper

KYB SM5325 Rear Upper Strut Mount

KYB SM5325 is a suspension shock absorber mounting kit for the rear upper position on select Nissan 300ZX models. It replaces worn mount components that can transmit vibration, noise, and harshness into the cabin while helping restore proper suspension feel.

Built under KYB’s Mount Components line, this part focuses on OE-style replacement fit and function for the application. For 1984-1989 Nissan 300ZX rear upper service, SM5325 addresses the mount and bearing interface that affects ride quality and suspension response.

Key Features

• OE-quality replacement strut mount for the specified application
• Superior rubber helps reduce noise, vibration, and harshness
• Mount bearings promote smoother steering action and help maintain front-end alignment
• Matched-grade studs and nuts support proper service fitment
• Engineered to optimize suspension performance for the vehicle application

Product Details

KYB Mount Components are built to replace aged vibration insulators and worn mounting hardware that can degrade ride comfort. On the Nissan 300ZX, the rear upper mount helps isolate road impacts and reduce the jarring effect that old mounts can transfer through the suspension. The SM5325 part number is also referenced in the aftermarket under Gabriel 142429 for the same application.

Fits 1984-1989 Nissan 300ZX, rear upper. This fitment covers the rear upper suspension mounting location for the listed model years and is intended for vehicles without adjustable suspension, as noted in the application data. KYB SM5325 is a direct-fit service part for this specific Nissan 300ZX mounting position.

Common Problems This Part Can Address

• Excess cabin noise from worn suspension mounts
• Harshness and vibration felt over bumps and rough pavement
• Loose or imprecise steering feel caused by worn mount bearings
• Front-end alignment concerns related to degraded bearing plates
• Suspension clunking or impact noise from hardened insulators

Installation Notes

Verify the rear upper mounting position and application notes before installation. Inspect surrounding suspension components for wear, including bearings, insulators, and related hardware, so the new mount is not installed alongside damaged parts that can affect performance. Professional installation is recommended for proper suspension service and alignment verification after replacement.

Quality Assurance

KYB is known for OE-style suspension replacement components, and the Mount Components line is built around application-specific fit and function. SM5325 follows that approach with a service part intended to restore the mount interface on the Nissan 300ZX while maintaining the vehicle’s original suspension characteristics.