Moog RK623679 Suspension Control Arm and Ball Joint Assembly - Front Left Upper Forward

Moog RK623679 Front Left Upper Forward Control Arm

Moog RK623679 is a premium suspension control arm and ball joint assembly for the front left upper forward position. It is built for foreign and domestic nameplates with structural strength and corrosion protection in mind, making it a direct replacement choice for Audi, Porsche, and related applications.

Key Features

• Ball joint included for a complete upper control arm assembly
• Bushings included for proper suspension mounting and articulation
• Premium grade construction for service-focused replacement use
• Engineered with structural strength and corrosion protection
• Direct-fit application for the front left upper forward suspension position

Detailed Description

This Moog RK623679 suspension control arm and ball joint assembly is used in the front left upper forward position on a wide range of Audi, Porsche, and electric Audi models. It is a practical replacement for worn upper control arm components when restoring steering response, suspension geometry, and front-end stability. This part cross-references Delphi TC7779 for the same application.

Compatible vehicle coverage includes 2019-2025 Audi A6 Quattro, 2019-2025 Audi A7 Sportback, 2019-2023 Audi Q8, 2017-2024 Audi Q7, 2018-2024 Audi Q5, and 2019-2025 Porsche Cayenne. It also applies to models such as Audi A6 allroad, Q5 Sportback, SQ5, SQ7, RS Q8, RS6 Avant, RS7 Sportback, and e-tron variants listed in the fitment data. The part number RK623679 is also referenced by OE-style interchange numbers including 4M0407505B and 958407505B.

What It Helps Address

• Front-end clunking or looseness from worn upper control arm joints
• Uneven tire wear caused by suspension geometry issues
• Steering wander or reduced road feel from worn bushings
• Suspension noise over bumps and rough pavement
• Restoration of proper front left upper forward suspension movement

Installation Notes and Tips

Install RK623679 in the front left upper forward position only. Verify vehicle year, make, model, and suspension layout before installation, especially on Audi Q5, Audi Q7, Audi Q8, and Porsche Cayenne applications. After replacement, perform a professional wheel alignment to confirm suspension angles and steering tracking are set correctly.

Quality Assurance

Moog premium control arms are engineered for structural strength and corrosion protection, with bushings and ball joint included for a complete replacement assembly. The RK623679 part number is backed by Moog’s premium suspension component design for foreign and domestic applications.