Moog RK623978 Front Suspension Control Arm and Ball Joint Assembly

The Moog RK623978 is a front suspension control arm and ball joint assembly engineered as a direct-fit OE replacement. As a core component of the front suspension system, the control arm links the front wheel assembly to the vehicle's subframe structure, allowing the wheels to move vertically while maintaining proper alignment and steering geometry.

Key Features:

• Installation Ready: Pre-installed ball joint with sealed socket for maintenance-free, out-of-the-box installation
• Enhanced Structural Strength: Heat-treated high-strength steel construction to match or exceed OE specifications and inhibit premature failure
• Corrosion Protection: E-coated arm with coated studs to resist rust, salt, road grime, and moisture
• Optimized Bushings: Pre-installed bushings engineered for quiet operation and resistance to wear
• Precision Tolerances: Designed for direct-fit replacement to simplify installation and ensure proper steering alignment
• Flaw-Detection Tested: Rigorous quality testing ensures the assembly meets OE specifications and avoids early failure

The Moog RK623978 belongs to Moog's R-Series line, which carries a 3-year/36,000-mile warranty against defects in materials and workmanship. A worn or failing control arm can cause the vehicle to pull to one side, produce clunking noises over rough roads, and result in uneven or accelerated tire wear — replacing it with a quality Moog assembly restores confident handling and ride comfort.