Dorman 521-984 Radius Arm - Front Left or Front Right

Durable Radius Arm for Ford and Mazda Suspension Systems

The Dorman 521-984 radius arm is engineered to provide reliable suspension support for select Ford and Mazda trucks and SUVs. Constructed from sturdy steel with a black finish, this radius arm is designed to maintain proper wheel alignment and suspension geometry for vehicles like the Ford Ranger and Mazda B3000.

• Made from high-strength steel with a 5 mm wall thickness for durability
• Measures 567 mm in length and maximum width, ensuring precise fitment
• Black finish for corrosion resistance and long service life
• Compatible with Ford B2300, B3000, B4000, Bronco II, Explorer, Navajo, and Ranger models
• Standard replacement suspension grade type for reliable performance
• Includes one radius arm; bushings and mounting hardware not included
• Features fine thread type bolts with 0.75 inch diameter and 97 mm length

Product Details and Specifications

The Dorman 521-984 radius arm is designed to meet OEM specifications for suspension components on various Ford and Mazda vehicles. Its steel construction with a 5 mm wall thickness provides the necessary strength to withstand suspension stresses. The radius arm measures 567 mm in length and maximum width, with a minimum width of 129 mm, ensuring proper alignment and fitment. The black coating helps resist corrosion, extending the lifespan of the part. This radius arm uses fine thread bolts with a diameter of 0.75 inches and a length of 97 mm, and the mounting hole diameter is 19.3 mm. Note that bushings are made of rubber but are not included with this part, so replacement bushings must be sourced separately.

Compatible Vehicles and Applications

This radius arm is compatible with a range of Ford and Mazda models, including:

• Ford B2300, B3000, B4000 pickup trucks
• Ford Bronco II and Explorer SUVs
• Mazda Navajo and Ranger trucks

It is designed as a standard replacement part to restore proper suspension function and maintain vehicle handling characteristics.

Common Suspension Issues Addressed

• Worn or damaged radius arms causing misalignment
• Excessive suspension play or noise during driving
• Uneven tire wear due to suspension component failure
• Reduced vehicle stability and handling performance
• Corrosion or structural fatigue in original radius arm

Installation Notes and Tips

When installing the Dorman 521-984 radius arm, ensure that the vehicle is securely lifted and supported. Since bushings and mounting hardware are not included, inspect existing components for wear and replace as necessary. Use the specified fine thread bolts with 0.75 inch diameter and 97 mm length to secure the radius arm. Proper torque specifications should be followed to maintain suspension integrity. Alignment checks after installation are recommended to ensure optimal vehicle handling.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed industry standards for durability and performance. The 521-984 radius arm undergoes rigorous quality control to ensure fitment accuracy and material strength. While specific warranty details are not provided, Dorman typically offers limited warranties on suspension parts covering defects in material and workmanship.