KYB SM5440 Coil Spring Insulator - Rear Lower

KYB SM5440 Coil Spring Insulator

Restore quieter suspension operation with the KYB SM5440 coil spring insulator. This Mount Components part is built to replace worn rear lower spring insulators that can create vibration, squeaks, and rattles in the suspension.

Compatible with select Chevrolet Impala, Pontiac Grand Prix, Chevrolet Monte Carlo, Buick Century, and Oldsmobile Intrigue applications, the KYB SM5440 is an OE-style replacement for rear lower mounting points.

Key Features

• High-quality replacement spring insulator for suspension service
• Reduces 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 restoration
• Fits rear lower spring locations on select GM vehicles

Product Details

The KYB SM5440 coil spring insulator is engineered to replace hardened or deteriorated vibration insulators that can transfer noise into the cabin and affect ride quality. KYB’s Mount Components line focuses on OE-quality replacement parts for suspension mounting points, helping maintain proper spring isolation and consistent suspension performance. This part cross-references Monroe Shocks & Struts (e.g., 904941) for the same application.

Fits 2000-2013 Chevrolet Impala, rear lower. Fits 1997-2008 Pontiac Grand Prix, rear lower. Fits 2000-2007 Chevrolet Monte Carlo, rear lower. Fits 1997-2005 Buick Century, rear lower. Fits 1998-2002 Oldsmobile Intrigue, rear lower.

Common Issues This Part Can Address

• Suspension squeaks caused by worn spring insulation
• Rattling noises from hardened rear lower mount components
• Vibration transfer through deteriorated coil spring seats
• Loss of OE-style spring isolation at the rear suspension
• Noisy ride quality on select Chevrolet, Pontiac, Buick, and Oldsmobile models

Installation Notes and Tips

Inspect the rear lower spring mounting area for wear, cracking, or deformation before installation. Replace damaged insulators during suspension service to help maintain proper spring seating and noise isolation. Verify vehicle year, make, model, and rear lower position before ordering the KYB SM5440.

Quality Assurance

KYB designs Mount Components to provide OE-quality replacement fit and function for suspension applications. The SM5440 is built with the design and quality expected for direct replacement service on the listed vehicles.