Keep your steering sharp and your front-end geometry true with the Mevotech Supreme control arm CMS861136, a front left upper control arm and ball joint assembly that installs as a direct-fit replacement for the listed applications — including the 2018-2021 Lexus IS300, 2006-2021 Lexus IS350, 2006-2015 Lexus IS250, 2016-2017 Lexus IS200T and 2008-2014 Lexus IS F. See the Buyer's Guide tab for engine-specific fitment.
As an IS300 upper control arm, this unit combines the stamped-steel arm with a pre-assembled ball joint, so it locates the wheel, allows suspension travel and provides a steering pivot in one part.
Clunking or knocking from the front suspension, wandering steering or uneven tire wear can be signs the original control arm or its ball joint is worn. If that arm is the cause, this Mevotech Supreme assembly replaces it.
Interchange: 521-099
521099 · 19340076 · TC7331 · CB64117 · CB64117PR · CA8795 · 4863059065 · RK622662 · 30030593
This part cross-references / interchanges with the following part numbers:
Does this fit my Lexus IS300?
Yes — it's cataloged for the 2018-2021 Lexus IS300 in the front left upper position, and it also fits the IS350, IS250, IS200T and IS F. Check the Buyer's Guide tab for your engine.
Is this an upper or lower control arm?
This is the front left upper control arm and ball joint assembly for the listed applications.
Does it come with mounting hardware?
Yes. A part-specific slotted castle nut and an easy-snap cotter pin are provided to secure the ball joint to the vehicle. Consult the service information for the correct torque.
What does a control arm and ball joint assembly do?
It's the suspension arm that locates the wheel and lets it travel, with the ball joint built in to act as the steering and articulation pivot.
What are the signs it needs replacing?
Clunking or knocking over the front suspension, wandering steering, or uneven tire wear may signal a worn control arm or ball joint. Diagnose the cause before replacing.
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.
