Moog RK621975 Suspension Control Arm and Ball Joint Assembly - Front Right Lower Rearward

BMW Front Right Lower Rearward Control Arm

Moog RK621975 is a suspension control arm and ball joint assembly for the front right lower rearward position on select BMW 2 Series, 3 Series, and 4 Series models. It is built for structural strength and corrosion protection, with a rubber bushing and a press-in ball joint design for OE-style service replacement.

Key Features

• Front right lower rearward suspension control arm and ball joint assembly
• Rubber bushings included for the specified application
• Press-in ball joint mounting type with threaded stud
• No grease fitting included
• Non-adjustable design
• Maximum control arm length: 11.880 in.
• Engineered for structural strength and corrosion protection

Detailed Product Overview

This Moog control arm assembly, part number RK621975, is made for BMW suspension service where the original front right lower rearward arm has worn bushings or ball joint play. The assembly uses rubber bushing material and a press-in ball joint mounting style to match the service requirements of the listed BMW applications. This part cross-references Dorman OE Solutions 522-880 for the same application.

Compatible BMW applications include 2012-2016 BMW 328i, 2013-2018 BMW 320i, 2014-2018 BMW 328d, 2016-2018 BMW 330e, 2017-2018 BMW 330i, 2016-2018 BMW 340i, 2014-2016 BMW 228i, 2014-2016 BMW 428i, 2014-2016 BMW 435i, 2013-2015 BMW ActiveHybrid 3, and additional 2017-2021 BMW 230i, 430i, 440i, and M240i applications in the front right lower rearward position.

What It Helps Fix

• Front-end looseness from a worn control arm bushing
• Clunking or knocking from ball joint wear
• Uneven tire wear related to suspension geometry issues
• Steering wander or reduced directional stability
• Suspension noise during braking or turning

Installation Notes and Tips

• Install only on the listed front right lower rearward BMW applications.
• Press-in ball joint service requires the correct suspension tools and a proper press procedure.
• Inspect adjacent bushings, ball joints, and alignment settings during replacement.
• Because this arm is non-adjustable, final alignment should be checked after installation.

Quality Assurance

Moog premium control arms are engineered for structural strength and corrosion protection, giving this RK621975 assembly a service-focused OE-style construction for BMW suspension repair.