Dorman 520-725 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

Dorman 520-725 Front Left Lower Control Arm

This Dorman suspension control arm and ball joint assembly is a direct replacement for specific BMW applications. It is built for the front left lower position on 1978-1983 BMW 320i and is evaluated to help maintain smooth ride quality, directional stability, and predictable handling.

• Direct replacement for the original equipment control arm and ball joint assembly
• Fits 1978-1983 BMW 320i, front left lower
• Ball joint is installed and press-in mounted
• Pre-greased design with no grease fitting included
• Iron control arm construction with rubber bushings
• Includes mounting hardware and bushings
• Black casting/forged control arm finish

Built For OE-Style Suspension Service

Dorman 520-725 is a suspension control arm and ball joint assembly made for BMW 320i front left lower applications from 1978 through 1983. The assembly uses an iron control arm, rubber bushings, and a threaded ball joint stud with a 14 mm thread diameter. With the ball joint already installed and the unit pre-greased, this part supports a straightforward OE-style repair for worn front suspension components. This part cross-references Delphi TC358 for the same application.

Common Problems This Part Can Address

• Front-end clunking or looseness from a worn control arm assembly
• Uneven steering response caused by excess suspension play
• Directional instability during braking or lane changes
• Ball joint wear at the front left lower suspension point
• Rubber bushing deterioration that affects ride control

Installation Notes And Tips

Compatible With 1978-1983 BMW 320i, front left lower. Verify the mounting hole diameter of 12.3 mm and confirm the press-in ball joint style before installation. Because the assembly is not adjustable, proper alignment should be checked after replacement. The package contents are a control arm and ball joint assembly.

Quality Assurance

Dorman uses an industry-focused evaluation process for this suspension component to support consistent fit and function in the specified BMW 320i applications. Part number 520-725 is built as a direct replacement for OE-style suspension service.