Keep the front wheels steering and moving with the suspension as intended with the Mevotech Supreme 2020-2023 Ford Explorer ball joint, part number MS40558, a front lower joint that also fits the 2020-2024 Ford Police Interceptor Utility.
As a suspension ball joint, it forms the pivot between the lower control arm and the steering knuckle, and it installs as a direct-fit replacement for the listed applications. Mevotech engineers its Supreme parts in-house with application-specific upgrades for durability and performance. The Supreme ball joint line is built for high-usage passenger and commercial vehicles, SUVs, fleets and working trucks, and it goes through extensive in-house and third-party durability testing.
- Superior toughness: patented sintered bearings, designed for longer-lasting performance.
- Simple to service: a 90-degree SAE grease fitting is included, so the joint can be greased during routine maintenance.
- A faster fit: a part-specific nylon locking nut is provided to help speed up installation.
- Resists corrosion: a protective surface treatment helps prevent rust build-up.
Signs that a lower ball joint may need replacing include clunking or knocking over bumps, loose or wandering steering, uneven tire wear and noticeable play at the joint. These symptoms can have other causes, so have the suspension diagnosed before replacing parts. See the "Vehicles it fits" section for complete fitment details.
Interchange: 19473419 · LB5Z3K185A · LB5Z3K186A · MEF534 · MEF536
This part cross-references / interchanges with the following part numbers:
19473419, LB5Z3K185A, LB5Z3K186A, MEF534, MEF536, MS40558
Frequently Asked Questions
Will the Mevotech Supreme MS40558 fit my 2020-2023 Ford Explorer?
It is listed as a front lower ball joint for the 2020-2023 Ford Explorer. See the "Vehicles it fits" section for the full application list.
What does a lower ball joint do?
It is the pivot point between the lower control arm and the steering knuckle. It lets the wheel steer and move up and down with the suspension.
What comes in the box with this ball joint?
Along with the ball joint, Mevotech includes a 90-degree SAE grease fitting and a part-specific nylon locking nut.
What are signs the lower ball joint may need replacing?
Common signs include clunking over bumps, loose or wandering steering, uneven tire wear and play at the joint. Have the suspension inspected to confirm the cause first.
How is the MS40558 built to handle wear and rust?
It uses patented sintered bearings and a protective surface treatment that helps resist rust build-up. The line also goes through in-house and third-party durability testing.
