Moog RK621663 Suspension Control Arm and Ball Joint Assembly - Rear Right Lower

OE-Style Rear Right Lower Control Arm

Moog RK621663 is a suspension control arm and ball joint assembly for the rear right lower position on select Ford Escape and Mercury Mariner models. It is built with stamped steel construction, corrosion protection, and service-ready components for a direct replacement on standard-design rear suspension applications.

Fits 2009-2012 Ford Escape, rear right lower. Fits 2009-2011 Mercury Mariner, rear right lower. Moog RK621663 is engineered for foreign and domestic nameplates where structural strength and long-term durability matter.

Key Features

• Stamped steel control arm for structural strength
• Pre-greased for initial service readiness
• Grease fitting included for future lubrication
• Rubber bushings included for suspension isolation
• Press-in ball joint mounting with threaded stud type
• Mounting hardware included
• Black corrosion-resistant finish
• Non-adjustable OE-style replacement design

Detailed Description

Moog RK621663 is a rear right lower suspension control arm and ball joint assembly made for 2009-2012 Ford Escape and 2009-2011 Mercury Mariner models with the standard design rear suspension. The stamped steel arm is paired with rubber bushings and a press-in ball joint to restore the original suspension geometry at the rear right lower position. Pre-greasing and the included grease fitting support routine maintenance after installation. This part cross-references Dorman OE Solutions 522-320 for the same application.

What It Helps Address

• Rear suspension looseness or instability
• Clunking or knocking from worn control arm bushings
• Excessive play from a worn ball joint assembly
• Uneven tire wear related to rear suspension wear
• Corrosion-related replacement of the original arm

Installation Notes and Tips

Verify the vehicle uses the standard design rear suspension before ordering. This part is specific to the rear right lower position on the listed Ford Escape and Mercury Mariner applications. Inspect adjacent suspension components, fasteners, and alignment settings during installation, and torque all hardware to factory specifications after the vehicle is at ride height when required by service procedure.

Quality Assurance

Moog premium control arms are engineered for structural strength and corrosion protection, with service-oriented features such as pre-greasing and a grease fitting for maintenance. RK621663 is built as an OE-style replacement for the listed applications.