Dorman 540-899 Coil Spring Insulator - Front Upper

Dorman 540-899 Coil Spring Insulator

Dorman 540-899 is a front upper coil spring insulator made from rubber and precision-engineered for specific vehicle applications. It helps restore the interface between the coil spring and its mounting point on select Ford, Lincoln, Mercury, and Mazda models.

Key Features

• Rubber coil spring insulator with a circular shape
• Specific fit for front upper suspension locations
• Black finish
• Mounting hole attachment type
• Dimensions: 112 mm length, 112 mm width, 86 mm outside diameter, 77 mm inside diameter, 4.4 mm thickness
• Direct replacement for OE-style suspension service

Product Details

This coil spring insulator is built for the front upper suspension position on 2006-2012 Ford Fusion, 2007-2012 Lincoln MKZ, 2006-2011 Mercury Milan, 2005-2008 Mazda 6, and 2006 Lincoln Zephyr. Dorman 540-899 is engineered to match the original equipment application on these vehicles, helping maintain proper spring seating and suspension interface at the upper mount. This part cross-references MOOG Chassis Products K160450 for the same application.

What It Helps Address

• Noise from worn or deteriorated spring isolators
• Metal-to-metal contact at the coil spring seat
• Improper spring seating at the front upper mount
• Suspension vibration transmitted through the spring perch area
• Replacement needs during front suspension service on Ford Fusion, Lincoln MKZ, Mercury Milan, and Mazda 6 models

Installation Notes and Tips

Install at the front upper coil spring location only on the listed applications. Verify the spring seat orientation and mounting hole alignment before assembly. Because mounting hardware is not included, reuse or source the required hardware as needed for the vehicle service procedure. Confirm vehicle year, make, model, and front upper suspension configuration before ordering Dorman 540-899.

Quality Assurance

Dorman states that this coil spring insulator is precision-engineered and rigorously tested to provide a reliable OE-style replacement for specific vehicles. The part number 540-899 is also listed with OE interchange references for application matching.