Dorman 527-258 Suspension Control Arm and Ball Joint Assembly - Front Right Upper

Dorman 527-258 Front Right Upper Control Arm

Dorman 527-258 is a direct replacement suspension control arm and ball joint assembly for select BMW applications. It is built for the front right upper position and is engineered to restore smooth ride quality, directional stability, and predictable steering response on BMW X5, X6, X7, Alpina XB7, and iX models.

Key Features

• Direct replacement for the original equipment front right upper control arm
• Pre-greased ball joint for ready-to-install service
• Ball joint included and installed
• Aluminum control arm construction with casting/forged design
• Rubber and steel bushings included
• Machined ball joint mounting type with pinch-style stud
• Standard replacement grade for OE-style fit and function
• Mounting hardware included
• Cross-references MOOG Chassis Products RK623926 and Mevotech Supreme CMS101583 for the same application

Detailed Description

This suspension control arm assembly is designed to replace the original front right upper arm on specific BMW platforms, including the 2019-2025 BMW X5, 2020-2025 BMW X6, 2019-2025 BMW X7, 2021-2025 BMW Alpina XB7, and 2022-2025 BMW iX. Dorman 527-258 uses an aluminum arm with a casting/forged construction, pre-installed bushings, and an installed ball joint to match the OE-style layout and help maintain proper suspension geometry. The part number 527-258 is a practical choice when servicing worn upper control arm components on BMW X5 and BMW X7 front suspension systems.

What It Helps Fix

• Front-end clunking or knocking from worn control arm components
• Loose or imprecise steering feel
• Uneven tire wear caused by suspension wear
• Excessive play from deteriorated bushings or ball joint wear
• Directional instability during braking or highway driving

Installation Notes and Tips

Verify vehicle fitment by year, make, model, and front right upper position before installation. Inspect adjacent suspension parts, alignment angles, and fasteners during replacement. Because the assembly is pre-greased and includes the ball joint, bushings, and mounting hardware, it is suited for a straightforward suspension service on the confirmed BMW applications. After installation, a professional wheel alignment is recommended to restore proper suspension settings.

Quality Assurance

Dorman uses an industry-focused evaluation process for this control arm and ball joint assembly to support consistent ride quality, directional stability, and predictable handling characteristics. The OE-style replacement design and application-specific fitment help ensure the part number 527-258 meets the needs of the listed BMW front suspension applications.