Dorman 520-147 Suspension Control Arm - Front Left Lower

Overview of Dorman Suspension Control Arm 520-147

The Dorman 520-147 suspension control arm is engineered for reliable performance in select Buick, Chevrolet, Oldsmobile, and Pontiac vehicles. Designed with durable steel construction and a coated finish, this control arm supports stable suspension function for models like the Cutlass Supreme, Grand Prix, Lumina, Monte Carlo, and Regal.

• Constructed from high-strength steel with casting and forging methods
• Includes a black rubber bushing with a 14.3 mm inside diameter and 39.6 mm outside diameter
• Overall length of 262.5 mm for precise fitment
• Welded ball joint mounting type with threaded stud (ball joint not included)
• Coated black finish for corrosion resistance
• Press-in end type with bushing linkage end
• Includes one rubber bushing; mounting hardware and ball joint not included

Detailed Product Description

The Dorman 520-147 suspension control arm is designed to restore proper suspension geometry and handling characteristics in compatible vehicles. Its steel construction combines casting and forging techniques to provide strength and durability under road stress. The included rubber bushing helps absorb vibrations and reduce noise, contributing to a smoother ride. The control arm features a welded ball joint mounting point with a threaded stud, allowing for secure attachment of the ball joint (sold separately). The coated black finish offers protection against corrosion, extending the service life of the component. With an overall length of 262.5 mm and precise bushing dimensions, this control arm is engineered to meet factory specifications for Buick Cutlass Supreme, Chevrolet Lumina, Oldsmobile Regal, Pontiac Grand Prix, and Monte Carlo models.

Compatible Vehicles and Applications

This suspension control arm is compatible with the following makes and models:

• Buick Cutlass Supreme
• Chevrolet Lumina
• Oldsmobile Regal
• Pontiac Grand Prix
• Pontiac Monte Carlo

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing excessive play
• Corroded or weakened control arm structure affecting alignment
• Noise and vibration from deteriorated suspension components
• Loose or damaged ball joint mounting points (ball joint replacement required separately)
• Uneven tire wear due to suspension misalignment

Installation Notes and Tips

• Ensure vehicle is securely lifted and supported before removal
• Inspect ball joint and mounting hardware; replace if necessary as they are not included
• Use proper torque specifications when installing the control arm
• Check alignment after installation to maintain handling performance
• Grease fitting is not included; no lubrication points on this control arm

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards for fit, form, and function. The 520-147 control arm undergoes rigorous quality checks to ensure durability and performance. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship. Refer to Dorman’s official documentation for exact warranty terms.