Moog RK100124 Suspension Control Arm and Ball Joint Assembly - Rear Lower Forward

Rear Lower Forward Control Arm for Subaru Applications

The Moog RK100124 is a rear lower forward suspension control arm and ball joint assembly built for Subaru and Scion applications that need precise rear suspension geometry. It features a forged steel control arm, an adjustable design, and a greasable service setup for routine maintenance.

Compatible with 2008-2023 Subaru and Scion rear suspension applications, including Subaru WRX, WRX STI, Crosstrek, Forester, Legacy, Outback, Impreza, BRZ, XV Crosstrek, and Scion FR-S in the rear lower forward position. The RK100124 is a direct-fit OE-style replacement for vehicles requiring toe adjustment plus or minus 3 degrees.

• Forged steel control arm for structural strength
• Adjustable rear lower forward design for alignment correction
• Grease fitting included for serviceable lubrication
• Bushings included with rubber bushing material
• Press-in ball joint with threaded stud type
• Corrosion-protection-focused construction for long-term use

Detailed Product Overview

Moog RK100124 is engineered as a premium suspension control arm and ball joint assembly for rear lower forward mounting locations. The forged steel construction supports the demands of daily driving, while the adjustable geometry helps restore rear toe settings on Subaru BRZ, Crosstrek, WRX, WRX STI, Forester, Legacy, Outback, Impreza, XV Crosstrek, and Scion FR-S models. This part cross-references Dorman OE Solutions 537-163 for the same application.

Common Problems This Part Addresses

• Rear wheel alignment that cannot be brought back into specification
• Excessive rear suspension play from worn bushings or ball joint wear
• Clunking or looseness from a deteriorated control arm assembly
• Uneven tire wear caused by incorrect rear toe settings
• Corrosion-related replacement needs on aging suspension components

Installation Notes and Tips

Install RK100124 in the rear lower forward position only on the listed Subaru and Scion applications. Because this assembly is adjustable, a professional alignment is required after installation to set rear toe correctly. Verify press-in ball joint service requirements and confirm all suspension fasteners are torqued to the vehicle manufacturer’s specifications.

Quality Assurance

Moog premium control arms are engineered for structural strength and corrosion protection, with OE-style replacement coverage for foreign and domestic nameplates. Part number RK100124 is built to meet the demands of the listed Subaru and Scion rear suspension applications.