KYB SM5711 Coil Spring Insulator - Rear Upper

KYB SM5711 Rear Upper Coil Spring Insulator

KYB SM5711 is a rear upper coil spring insulator for select Ford Explorer and Mercury Mountaineer applications. It is built to replace hardened spring seats that can transmit vibration, squeaks, and rattles into the suspension.

Part of KYB Mount Components, this replacement spring seat is designed for OE-style fit and function in the suspension system. For 2006-2010 Ford Explorer and 2006-2010 Mercury Mountaineer rear upper applications, KYB SM5711 helps restore quieter operation and consistent spring support.

Key Features

• OE-quality replacement spring seat for the rear upper suspension position
• Reduces squeaks, rattles, and vibration noise from worn insulators
• Built to match or exceed original equipment design and quality
• Designed for select 2006-2010 Ford Explorer and Mercury Mountaineer models
• KYB part number SM5711 for direct application lookup

Detailed Description

KYB spring seats and insulators are engineered to replace aged rubber components that can harden over time and allow unwanted noise and vibration to pass through the suspension. SM5711 is a rear upper coil spring insulator for the Ford Explorer and Mercury Mountaineer, helping maintain proper spring seating while supporting quieter suspension operation. If you are servicing a 2006-2010 Ford Explorer rear upper suspension or a 2006-2010 Mercury Mountaineer rear upper suspension, this KYB Mount Components part provides a direct-fit replacement solution. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Solve

• Suspension squeaks caused by worn spring insulators
• Rattling noises from hardened or deteriorated rubber seats
• Vibration transfer through the rear upper spring mount
• Poor spring isolation from aged OE-style insulators
• Noise complaints after suspension wear or service

Installation Notes and Tips

Install SM5711 in the rear upper coil spring position only on the listed applications. Inspect the surrounding spring seat, isolator surfaces, and suspension hardware for wear before reassembly. Proper seating of the coil spring is important for noise control and suspension performance.

Quality Assurance

KYB positions its Mount Components line as OE-quality replacement suspension parts, with spring seats and insulators designed for application-specific fit and consistent performance. SM5711 is built to the same design and quality standards associated with KYB replacement suspension components.