HomeSuspension > Suspension, Springs and Related ComponentsMoog RK621852 Suspension Control Arm and Ball Joint Assembly - Rear Lower or Rear Lower Forward
Part #: RK621852

Moog RK621852 Suspension Control Arm and Ball Joint Assembly - Rear Lower or Rear Lower Forward

Rear Lower Forward and Rear Lower
24 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$58.29Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Hyundai and Kia, Magentis, Optima, Sonata, XG300, and XG350
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Moog RK621852 Suspension Control Arm Assembly

The Moog RK621852 suspension control arm and ball joint assembly is designed for reliable performance on select Hyundai and Kia models. This pre-greased, stamped steel control arm offers a durable solution for maintaining proper suspension geometry and vehicle handling.

  • Pre-greased for immediate use without additional lubrication
  • Includes rubber bushings for vibration dampening and noise reduction
  • Stamped steel construction ensures strength and durability
  • Press-in ball joint with threaded stud for secure mounting
  • Compatible with Hyundai Magentis, Sonata, Kia Optima, XG300, and XG350
  • Black finish for corrosion resistance and long service life
  • Mounting hardware included for straightforward installation

Detailed Product Description

The Moog RK621852 suspension control arm and ball joint assembly is engineered to restore suspension performance on Hyundai and Kia vehicles including the Magentis, Sonata, Optima, XG300, and XG350. Constructed from stamped steel, this control arm provides a robust framework to support the vehicle’s suspension system. The assembly comes pre-greased, eliminating the need for additional lubrication during installation. Rubber bushings are included to absorb road vibrations and reduce noise, contributing to a smoother ride. The ball joint features a press-in mounting type with a threaded stud, ensuring a secure and precise fit. Finished in black, the control arm resists corrosion and maintains structural integrity over time. The maximum length of 13.770 inches fits the specified vehicle models accurately, making the Moog RK621852 a reliable replacement part.

Common Applications and Issues Addressed

  • Restores proper suspension alignment and handling
  • Eliminates clunking or knocking noises from worn control arms
  • Reduces uneven tire wear caused by faulty suspension components
  • Improves vehicle stability and steering response
  • Replaces damaged or corroded control arms on Hyundai and Kia models

Installation Notes and Tips

  • Pre-greased ball joint allows for immediate installation without additional lubrication
  • Ensure compatibility with Hyundai Magentis, Sonata, Kia Optima, XG300, and XG350 before installation
  • Use proper tools to press in the ball joint securely and torque the threaded stud to manufacturer specifications
  • Inspect surrounding suspension components during installation for wear or damage

Quality Assurance and Warranty

Moog suspension components are manufactured to meet or exceed OEM standards, providing dependable performance and durability. The RK621852 control arm assembly undergoes rigorous quality control to ensure fit, form, and function. While specific warranty details are not provided here, Moog typically offers limited warranties on their suspension parts to cover defects in materials and workmanship.

BrandMoog
Part NumberRK621852
Pre-GreasedYes
Grease Fitting IncludedNo
Bushings IncludedYes
Ball Joint Mounting TypePress in
Ball Joint Stud TypeThreaded
Control Arm MaterialStamped steel
Mounting Hardware IncludedYes
AdjustableNo
Control Arm ColorBlack
Control Arm Maximum Length13.770
Bushing MaterialRubber

This part fits 24 vehicles. Search below:

YearMakeModelPositionNotes
2006KiaMagentisRear Lower Forward
2006KiaOptimaRear Lower Forward
2005HyundaiSonataRear LowerSuspension Control Arm and Ball Joint Assembly meets OEM standards.
2005HyundaiXG350Rear LowerSuspension Control Arm and Ball Joint Assembly meets OEM standards.
2005KiaMagentisRear Lower Forward
2005KiaOptimaRear Lower ForwardSuspension Control Arm and Ball Joint Assembly meets OEM standards.
2004HyundaiSonataRear LowerSuspension Control Arm and Ball Joint Assembly meets OEM standards.
2004HyundaiXG350Rear LowerSuspension Control Arm and Ball Joint Assembly meets OEM standards.
2004KiaMagentisRear Lower Forward
2004KiaOptimaRear Lower ForwardSuspension Control Arm and Ball Joint Assembly meets OEM standards.
2003HyundaiSonataRear LowerSuspension Control Arm and Ball Joint Assembly meets OEM standards.
2003HyundaiXG350Rear LowerSuspension Control Arm and Ball Joint Assembly meets OEM standards.
2003KiaMagentisRear Lower Forward
2003KiaOptimaRear Lower ForwardSuspension Control Arm and Ball Joint Assembly meets OEM standards.
2002HyundaiSonataRear LowerSuspension Control Arm and Ball Joint Assembly meets OEM standards.
2002HyundaiXG350Rear LowerSuspension Control Arm and Ball Joint Assembly meets OEM standards.
2002KiaMagentisRear Lower Forward
2002KiaOptimaRear Lower ForwardSuspension Control Arm and Ball Joint Assembly meets OEM standards.
2001HyundaiSonataRear LowerSuspension Control Arm and Ball Joint Assembly meets OEM standards.
2001HyundaiXG300Rear LowerSuspension Control Arm and Ball Joint Assembly meets OEM standards.
2001KiaMagentisRear Lower Forward
2001KiaOptimaRear Lower ForwardSuspension Control Arm and Ball Joint Assembly meets OEM standards.
2000HyundaiSonataRear LowerSuspension Control Arm and Ball Joint Assembly meets OEM standards.
1999HyundaiSonataRear LowerSuspension Control Arm and Ball Joint Assembly meets OEM standards.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

102-7238260641345D10637507-1864521-059522-1675521038000CB60555CMS90172FA3407MS90172

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.