Moog RK621603 Suspension Control Arm and Ball Joint Assembly - Front Right Lower

Front Right Lower Control Arm Assembly

Moog RK621603 is a suspension control arm and ball joint assembly for the front right lower position on select Ford, Mercury, and related applications. It is built with forged steel construction, a press-in ball joint, and rubber bushings to support stable suspension movement and consistent steering response.

Compatible with 2005-2007 Ford Five Hundred, 2005-2007 Ford Freestyle, and 2005-2007 Mercury Montego, this RK621603 assembly is pre-greased and includes mounting hardware for service replacement work.

Key Features

• Forged steel control arm for structural strength
• Pre-greased for initial service readiness
• Rubber bushings included
• Press-in ball joint with threaded stud type
• Mounting hardware included
• Black corrosion-resistant finish
• Non-adjustable design for direct replacement use

Detailed Description

Moog RK621603 is engineered as a front right lower suspension control arm and ball joint assembly for 2005-2007 Ford Five Hundred, 2005-2007 Ford Freestyle, and 2005-2007 Mercury Montego applications. The forged steel arm provides a rigid foundation, while the rubber bushings help isolate suspension movement. Moog’s premium control arm design focuses on structural strength and corrosion protection for foreign and domestic nameplates. This part number, RK621603, is a direct-fit replacement choice for drivers servicing worn front suspension components on these vehicles.

This part cross-references Dorman OE Solutions 521-880 for the same application.

Common Repair Symptoms

• Clunking or knocking from the front suspension
• Uneven tire wear caused by worn control arm bushings or ball joint wear
• Loose or wandering steering feel
• Front-end vibration over bumps or during braking
• Excessive suspension play at the front right lower corner

Installation Notes and Tips

Install RK621603 at the front right lower position only on the listed Ford Five Hundred, Ford Freestyle, and Mercury Montego applications. Verify ball joint orientation, torque all fasteners to factory specifications, and perform a wheel alignment after installation. Inspect adjacent suspension parts, including tie rods, struts, and the opposite control arm, before returning the vehicle to service.

Quality Assurance

Moog premium control arms are engineered for structural strength and corrosion protection, with OE-style service fitment for the listed applications. RK621603 is built to support dependable suspension repair on the specified Ford and Mercury models.