Moog RK621978 Suspension Control Arm and Ball Joint Assembly - Front Right Lower Forward

BMW Front Right Lower Forward Control Arm

Restore front suspension geometry with the Moog RK621978 suspension control arm and ball joint assembly. This OE-style replacement is built for the front right lower forward position and is listed for a wide range of BMW 2 Series, 3 Series, 4 Series, and M models.

Moog RK621978 is engineered for structural strength and corrosion protection, with rubber bushings included for a direct replacement on the specified BMW applications.

Key Features

• Front right lower forward suspension control arm and ball joint assembly
• Press-in ball joint mounting type with threaded ball joint stud
• Bushings included with rubber bushing material
• Non-adjustable design for OE-style replacement
• No grease fitting included
• Built for structural strength and corrosion protection

Detailed Description

The Moog RK621978 control arm assembly is a fitment-specific suspension component for BMW models including the 2012-2021 BMW 328i, 2013-2018 BMW 320i, 2014-2016 BMW 428i, and 2017-2021 BMW 230i, among others. It serves the front right lower forward position and is also listed for applications described as tension strut type premium OE replacement on many BMW chassis.

This part cross-references Dorman OE Solutions 522-882 for the same application. If you are replacing a worn BMW front suspension control arm, RK621978 provides the correct mounting style and bushing configuration for the listed vehicles.

What It Helps Address

• Front-end clunking or looseness from worn suspension joints
• Uneven tire wear caused by suspension geometry changes
• Steering pull or wandering linked to a damaged control arm
• Vibration or instability from deteriorated bushings
• Noise during braking, turning, or road impacts

Installation Notes and Tips

Verify the front right lower forward position before ordering, since BMW suspension layouts can vary by model and year. Confirm the press-in ball joint style and threaded stud match the original part on your vehicle. After installation, a professional wheel alignment is recommended to restore suspension settings.

Quality Assurance

Moog premium control arms for foreign and domestic nameplates are engineered for structural strength and corrosion protection. RK621978 is built to meet the demands of the listed BMW applications, including 2 Series, 3 Series, 4 Series, and M models.