KYB SM5984 Suspension Shock Absorber Mounting Kit - Rear Upper

KYB Rear Upper Strut Mount for Select Toyota and Lexus Models

KYB SM5984 is a rear upper suspension shock absorber mounting kit for select Toyota, Lexus, and Subaru applications. It replaces worn vibration insulators and helps restore quieter, more controlled suspension operation on vehicles such as the Toyota RAV4, Corolla, and Lexus NX series.

Key Features

• OE-quality replacement strut mount from KYB Mount Components
• Reduces vibration and road noise transmitted through worn mounts
• Helps cushion impacts from bumps for smoother rear suspension response
• Supports steering and alignment-related suspension function where applicable
• Direct-fit application coverage for rear upper mounting locations
• Part number SM5984 for easy identification and ordering

Product Details

KYB Mount Components are built for application-specific replacement needs, and SM5984 follows that approach for rear upper suspension mounting points. On vehicles like the Toyota RAV4, Toyota Corolla, Lexus UX250h, and Lexus NX350h, a worn mount can allow extra noise, vibration, and harshness to enter the cabin. This KYB strut mount is engineered to replace hardened insulators and help maintain the suspension feel expected from the original setup. This part cross-references Toyota/Lexus OE numbers 48750F4010 and 487500R010 for the same application.

What It Helps Address

• Clunking or knocking from the rear suspension mount area
• Excess vibration felt through the body or cabin
• Harsh impact transfer over bumps and rough pavement
• Wear-related noise from hardened or deteriorated mount insulators
• Alignment or steering feel concerns tied to mount wear on supported applications

Installation Notes and Tips

Install SM5984 at the rear upper mounting position only on the listed applications. Verify vehicle year, make, model, and trim before ordering, since fitment varies across Toyota, Lexus, and Subaru platforms. Inspect the surrounding suspension components, including the strut assembly and related bushings, before installation to confirm the source of noise or vibration.

Quality Assurance

KYB is known for OE-style suspension replacement components, and its strut mounts and bearing plates are built around application-specific fitment and performance requirements. SM5984 is part of KYB’s Mount Components line, focused on restoring proper suspension isolation and mounting function.