Dorman 521-323 Lateral Arm - Rear Left or Rear Right

Dorman 521-323 Rear Lateral Arm

Dorman 521-323 is a steel rear lateral arm for select Cadillac applications, built as a direct replacement for the original suspension link. It is precision-engineered and tested for dependable OE-style fit on Cadillac Eldorado, DeVille, Seville, and Allante models with rear left or rear right placement.

Key Features

• Steel construction for suspension strength and durability
• Rubber bushings included for proper mounting and ride isolation
• Casting/forged control arm type for OE-style replacement fit
• No ball joint included or installed
• Adjustable: No
• Grease fitting not required
• Part number: 521-323

Detailed Description

This Dorman lateral arm is made for rear suspension service on specific Cadillac models, including Cadillac Eldorado, Cadillac DeVille, Cadillac Seville, and Cadillac Allante. The steel arm and rubber bushings are selected to match the original suspension layout, helping restore rear suspension geometry and secure wheel location. If you need a rear lateral arm for a 1994-2002 Cadillac Eldorado, rear left or rear right, or a 1994-1999 Cadillac DeVille, rear left or rear right, this part number 521-323 is built for that application. It also covers 1994-1997 Cadillac Seville, rear left or rear right, and 1993 Cadillac Allante, rear left or rear right.

This part cross-references MOOG Chassis Products RK643061 for the same application.

What It Helps Fix

• Rear suspension looseness or instability
• Clunking or knocking from worn suspension links
• Uneven rear tire wear caused by worn bushings or arm movement
• Imprecise rear wheel tracking on affected Cadillac models
• Excess play from a fatigued OE lateral arm

Installation Notes and Tips

• Verify rear left or rear right position before installation.
• Inspect adjacent suspension bushings and mounting points for wear or damage.
• Use the vehicle’s service procedure for final tightening at ride height when required.
• Confirm fitment against the vehicle year, model, and rear suspension position before ordering.

Quality Assurance

Dorman designs this replacement lateral arm to match the original equipment application on the listed Cadillac vehicles. The part is rigorously tested for fit and function, and the steel construction with included bushings supports reliable suspension service. Part number 521-323 is a direct-fit replacement for select Cadillac rear suspension applications.