Keep the front of your truck steering tight and controlled with the Mevotech Supreme Suspension Ball Joint MS40556, a direct-fit front lower 2021-2025 Ford F-150 ball joint. This pivot joint connects the lower control arm to the steering knuckle, letting the wheel steer and travel while carrying suspension load — when a worn joint is the cause of clunking, loose steering, or uneven tire wear, this replaces it.
Built for high-usage commercial and passenger trucks, SUVs and fleets, the Mevotech Supreme line is engineered in-house with application-specific upgrades and backed by extensive in-house and third-party durability testing.
Interchange: 19474584 · ML3Z3050A · ML3Z3078E · ML3Z3079C · K500443
This part cross-references / interchanges with the following part numbers:
What vehicles does the Mevotech Supreme MS40556 fit?
It is a direct-fit front lower suspension ball joint for the 2021-2025 Ford F-150. Check the "Vehicles it fits" section to confirm the fit for your specific truck.
Where does this ball joint mount?
It is the front lower ball joint, connecting the lower control arm to the steering knuckle so the front wheel can steer and travel while supporting suspension load.
Does this ball joint come with a grease fitting?
Yes. An SAE grease fitting is included so you can re-grease the joint during service, and additional installation hardware is packed in the box.
What are the signs a front lower ball joint may need replacing?
Common signs include clunking over the front end, loose or wandering steering, and uneven tire wear. Have the cause diagnosed, since these symptoms can come from other worn parts too.
Does it resist corrosion?
Yes. A protective surface treatment helps prevent rust build-up and adds longevity. The Supreme line is also validated with in-house and third-party durability testing.
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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.
