Dorman 540-440 Suspension Stabilizer Bar Bushing Kit - Rear

Rear Stabilizer Bar Bushing Kit for Mazda MX-5

Dorman 540-440 is a standard replacement suspension stabilizer bar bushing kit for the rear sway bar on select Mazda MX-5 and Miata applications. It is precision-engineered and tested to match the original equipment function on the listed vehicles, helping restore stable suspension movement and bar support.

Key Features

• Standard replacement stabilizer bar bushings for rear suspension service
• Rubber construction for OE-style compliance and noise isolation
• Designed for 11 mm diameter rear stabilizer bars on listed Mazda applications
• Bracket not included
• Grease fitting not included
• Fits select 1993-2015 Mazda Miata, Mazda MX-5, and Mazda MX-5 Miata rear applications

Detailed Description

Dorman 540-440 is built for rear stabilizer bar service on Mazda MX-5, Mazda MX-5 Miata, and Mazda Miata models listed in the fitment data. The rubber bushing material is selected to provide the support and isolation expected in a suspension stabilizer bar bushing kit, while the standard replacement grade keeps the part aligned with OE-style service needs. This part cross-references Mevotech Supreme MK90643 for the same application.

Common Issues Addressed

• Rear sway bar clunking or rattling from worn bushings
• Excessive play at the stabilizer bar mounting point
• Noise caused by hardened, cracked, or compressed rubber bushings
• Reduced suspension control from deteriorated rear bar support
• Service replacement for worn OE rear stabilizer bar bushings

Installation Notes and Tips

Verify rear stabilizer bar diameter and vehicle application before installation. This kit is listed for 11 mm diameter bar applications on specific Mazda MX-5 and Miata models. Inspect the stabilizer bar and mounting area for wear, corrosion, or damage before installing new bushings, and replace any worn components that could affect fit or performance.

Quality Assurance

Dorman designs this suspension stabilizer bar bushing kit as a precision-engineered replacement and subjects it to testing for reliable OE-style service on the listed vehicles. Part number 540-440 is intended for direct replacement use on the confirmed Mazda rear applications.