Chase down a worn IS300 ball joint with the MOOG K500370 Suspension Ball Joint, a direct-fit replacement for the front right lower position on the 2021-2023 Lexus IS300 and IS350, 2022-2023 IS500, 2016-2017 GS200T, 2018-2019 GS300, 2013-2020 GS350, 2013-2018 GS450H, 2016-2017 RC200T, 2018-2023 RC300 and 2015-2023 RC350 — see the Buyer's Guide tab for engine-level details. This ball joint pivots the steering knuckle against the lower control arm, letting the wheel steer and travel while carrying suspension load; worn units show signs it may need replacing — clunking over bumps, loose or wandering steering, and uneven tire wear.
If a failed ball joint is the cause of your symptoms, this replaces it. Designed to meet or exceed original-equipment performance, with broad coverage across foreign and domestic applications.
Interchange: 2700511944 · MS86509 · 2601911 · JBJ597 · 4333039865 · TORK500123
This part cross-references / interchanges with the following part numbers:
Will this fit my Lexus IS300 ball joint replacement?
Yes — the K500370 is the front right lower ball joint for the 2021-2023 Lexus IS300, and it also covers the IS350, IS500, GS and RC models. Check the Buyer's Guide tab to confirm your exact year and engine.
What position on the vehicle does this ball joint fit?
It is the front right (passenger side) lower suspension ball joint. It is not the upper joint or the left-side unit.
What are the signs of a worn ball joint?
Common signs are clunking or knocking over bumps, loose or wandering steering, and uneven tire wear. Have the cause diagnosed, since these symptoms can come from other suspension parts too.
Does this ball joint have corrosion protection?
Yes. It has a protective coating that helps resist corrosion, and its construction and design were validated by MOOG engineers.
Do I need to replace the IS300 lower ball joint in pairs?
This listing is for the one front right lower joint. Many shops inspect and, if needed, replace the matching left-side joint at the same time for balanced steering.
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.
