Moog RK623558 Suspension Control Arm and Ball Joint Assembly - Front Left Lower Rearward

Moog Front Left Lower Rearward Control Arm

The Moog RK623558 is a premium suspension control arm and ball joint assembly for the front left lower rearward position on select Cadillac CTS models. It is built for structural strength and corrosion protection, with the ball joint and bushings included for a complete service replacement.

Fits 2014-2019 Cadillac CTS, front left lower rearward. This part cross-references GM OE numbers 20888441 and 23377059 for the same application.

Key Features

• Premium-grade suspension control arm and ball joint assembly
• Ball joint included for direct replacement service
• Bushings included for the specified suspension position
• Engineered for structural strength
• Corrosion-protected construction for long-term durability
• Fits 2014-2019 Cadillac CTS, front left lower rearward

Detailed Description

Moog RK623558 is a front left lower rearward control arm assembly for the Cadillac CTS, covering 2014-2019 model years. As a premium suspension component, it combines the control arm, ball joint, and bushings in one service part to restore proper suspension geometry at the specified corner of the vehicle. The RK623558 is a practical choice when replacing worn front suspension hardware on a Cadillac CTS and is referenced by OE part numbers 20888441 and 23377059.

For shoppers searching for a 2014-2019 Cadillac CTS front left lower rearward control arm with ball joint, this Moog assembly provides a direct-fit replacement option for the listed application. The RK623558 part number is also useful when cross-checking suspension service parts for the Cadillac CTS platform.

What It Helps Address

• Front-end clunking or knocking from worn suspension joints
• Excessive play in the front left lower rearward suspension position
• Uneven tire wear caused by worn control arm bushings or ball joint wear
• Steering pull or unstable handling from degraded suspension geometry
• Inspection failures related to worn lower control arm components

Installation Notes and Tips

Install on the front left lower rearward position only for the listed Cadillac CTS fitment. After replacement, a professional wheel alignment is recommended to verify suspension geometry and steering wheel center. Confirm vehicle year, model, and position before ordering, and compare the RK623558 with the removed part to ensure the correct application.

Quality Assurance

Moog manufactures premium suspension components for foreign and domestic nameplates, with an emphasis on structural integrity and corrosion protection. The RK623558 is built to meet the demands of routine suspension service on the Cadillac CTS platform.