Tighten up your steering and restore front-end control with the SKP GS300 control arm — a front right upper control arm and ball joint assembly (MPN SK520458) that pairs a durable control arm with a pre-installed ball joint. This SKP control arm drops in as a direct-fit replacement for the 1998-2005 Lexus GS300, 1998-2000 Lexus GS400, 2001-2005 Lexus GS430, and 2002-2010 Lexus SC430 — see the Buyer's Guide tab for engine-level fitment.
By replacing a worn front right upper control arm and its ball joint, this SKP assembly helps restore precise handling and confident everyday driving.
Interchange: 520-458 · 15-K620335 · M13-K620335A
520458 · 15K620335 · M13K620335A · 4861039085 · WC120458 · RK620335 · CMS86104
This part cross-references / interchanges with the following part numbers:
Does this Lexus GS300 control arm fit my car?
Yes — it's a direct-fit front right upper control arm for the 1998-2005 Lexus GS300. Check the Buyer's Guide tab to confirm your engine and options.
Is the ball joint already installed?
Yes. The assembly ships pre-assembled with the ball joint already installed, so you don't need to press one in separately.
Does this fit the Lexus SC430?
Yes — this Lexus SC430 control arm is listed for the 2002-2010 Lexus SC430, plus the 1998-2000 Lexus GS400 and 2001-2005 Lexus GS430. See the Buyer's Guide tab for full fitment.
Does it come with mounting hardware?
It includes the necessary hardware where pictured. Confirm the hardware shown against your vehicle before installing.
What are signs my control arm or ball joint needs replacing?
Clunking from the front suspension, a bumpy ride, loose or wandering steering, and uneven tire wear can indicate a worn control arm or ball joint.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
