KYB SM5358 Coil Spring Insulator - Rear Upper

KYB SM5358 Coil Spring Insulator for Jaguar Rear Upper

Restore quieter suspension operation with the KYB SM5358 coil spring insulator. This rear upper mount component is made for Jaguar applications where worn insulators can create vibration, squeaks, and rattles from the suspension.

Built for Jaguar XKR, XK8, Vanden Plas, XJ8, XJR, XJ6, and XJ12 rear upper positions, this KYB spring insulator is an OE-quality replacement designed to match the original fit and function.

Key Features

• High-quality replacement spring insulator for suspension service
• Reduces squeaks, rattles, and vibration noise from worn insulators
• Built to match or exceed original equipment design and quality
• Engineered for rear upper Jaguar suspension applications
• KYB Mount Components product line for suspension mounting parts

Product Details

The KYB SM5358 is a coil spring insulator used in the rear upper suspension position on select Jaguar models. As part of KYB’s Mount Components line, it is intended to replace hardened or deteriorated spring seats and insulators that can transfer unwanted noise into the cabin. For drivers searching for a Jaguar XKR rear upper coil spring insulator, Jaguar XK8 suspension insulator, or a KYB SM5358 replacement for Jaguar XJ8 and XJR applications, this part provides a direct-fit service solution.

This part cross-references Jaguar MMD3565AA for the same application.

What It Helps Fix

• Squeaks from aged suspension insulators
• Rattles caused by hardened spring seats
• Vibration noise transmitted through the rear suspension
• Noise complaints after suspension wear or service
• Loss of proper spring isolation at the rear upper mount

Installation Notes and Tips

Install the SM5358 in the rear upper spring location on the listed Jaguar applications. Inspect adjacent suspension mounting parts for wear, cracking, or compression damage before reassembly. Proper alignment of the spring seat and insulator is important for correct suspension operation and noise control.

Quality Assurance

KYB designs Mount Components to provide OE-quality replacement parts for specific applications. The SM5358 is built with the design and quality expected for Jaguar suspension service and is intended to restore proper spring isolation and reduce unwanted noise.