KYB SM5549 Coil Spring Insulator - Rear

KYB SM5549 Coil Spring Insulator

Restore quieter suspension operation with the KYB SM5549 coil spring insulator. This Mount Components part is built to replace worn spring seats that can harden over time and create vibration, squeaks, and rattles in the rear suspension.

Compatible with select Pontiac Montana, Chevrolet Uplander, Buick Terraza, Saturn Relay, Pontiac Aztek, and Oldsmobile Silhouette rear suspension applications, the KYB SM5549 is an OE-style replacement made for application-specific fitment.

Key Features

• High-quality replacement spring insulator for rear suspension service
• Helps reduce squeaks, rattles, and vibration noise from aged insulators
• Built to match or exceed original equipment design and quality
• Part of KYB Mount Components for suspension repair and restoration
• Direct replacement fitment for select GM minivan and crossover applications

Application Details

The KYB Mount Components line focuses on suspension contact points that affect ride comfort and noise control. The SM5549 coil spring insulator is engineered for rear upper and lower mount component applications, helping maintain proper spring seating and reduce unwanted movement at the suspension interface. This part number, SM5549, is used in rear suspension service on vehicles such as the Pontiac Montana and Chevrolet Uplander, where worn insulators can contribute to harshness and noise.

This part cross-references General Motors 10245059 for the same application.

What It Helps Fix

• Squeaks from hardened or deteriorated spring insulators
• Rattles caused by worn rear suspension contact points
• Vibration noise transmitted through the coil spring seat
• Loss of quiet ride quality in the rear suspension
• Improper spring seating from aged OE-style insulators

Installation Notes

Install the SM5549 in the rear suspension only, following the vehicle-specific service procedure for the application. Inspect the spring seat, surrounding mount components, and related hardware condition before reassembly. Verify the correct side and position against the vehicle service information, since fitment is listed for rear upper and lower mount component applications.

Quality Assurance

KYB is known for suspension replacement parts that follow OE-quality standards for fit and function. The SM5549 is built to the design and quality level expected for direct replacement service, with the goal of restoring proper spring isolation and reducing noise at the suspension mount.