Dorman 540-403 Suspension Stabilizer Bar Bushing Kit - Front

Dorman 540-403 Front Stabilizer Bar Bushings

Dorman 540-403 is a front suspension stabilizer bar bushing kit built as a standard replacement for specific Lexus applications. It is precision-engineered and tested to match original equipment fit and function on the listed vehicles, helping restore proper sway bar support and suspension control.

Key Features

• Standard replacement stabilizer bar bushings for front suspension service
• Rubber construction for OE-style compliance and noise isolation
• Inside diameter: 27 mm
• Outside diameter: 42 mm
• Assembled length: 51.5 mm
• No grease fitting included
• No bracket included
• Compatible with front applications on Lexus IS F, IS250, IS350, GS350, GS450h, GS460, GS430, and GS300

Detailed Description

This Dorman stabilizer bar bushing kit is made for front sway bar service on select Lexus models, including Lexus IS250, Lexus IS350, and GS350 applications. The rubber material is selected for a direct replacement profile, helping the stabilizer bar sit correctly in the bracket area and maintain consistent suspension response. Dorman 540-403 is a practical OE-style solution when the original bushings are worn, cracked, or no longer holding the bar securely.

This part cross-references MOOG Chassis Products K200621 for the same application.

What It Is Used For

• Front-end clunking or rattling caused by worn stabilizer bar bushings
• Excess sway bar movement in the front suspension
• Cracked, hardened, or deteriorated rubber bushings
• Restoring stable sway bar mounting on Lexus GS300 and Lexus GS430 front suspension systems
• Replacing OE-style bushings on Lexus IS F front suspension service

Installation Notes and Tips

Install on the front stabilizer bar only for the listed applications. Inspect the sway bar, mounting brackets, and surrounding hardware for wear before assembly. Clean the contact surfaces thoroughly so the new rubber bushings seat evenly and operate as intended. Verify vehicle fitment by year, make, model, and front position before installation.

Quality Assurance

Dorman designs this bushing kit as a precision-engineered replacement and subjects it to testing for reliable OE-style service on the specified vehicles. Part number 540-403 is built to meet standard replacement expectations for front suspension repair.