Dorman - OE Solutions Suspension Ball Joint P/N:539-845
Replace a worn front lower ball joint with the Dorman ball joint 544-845, listed for the 2020-2023 Ford Explorer and 2020-2026 Ford Police Interceptor Utility. Dorman builds it as a direct replacement designed to fit and perform like the original equipment on these vehicles. Because you replace only the failed joint instead of the complete assembly, it can help lower the repair cost.
Specifications: The stud is threaded and tapered, with a 16 mm thread diameter, a thread pitch of 2, a right-hand (clockwise) thread and a 36 mm thread length. It has no cotter-pin hole. The cone outside diameter is 21.3 mm and the wrench size is 16 mm. The joint is non-adjustable and standard replacement grade. It comes with a locking nut and a retaining ring. A castle nut, cotter pin, washers and mounting bolts are not included. Country of origin: Turkey.
The listed applications use two per vehicle. This listing is for one, so order 2 for a complete replacement.
A ball joint connects the control arm to the steering knuckle and lets the suspension pivot as the wheel moves and steers. Signs that a ball joint may need replacing include clunking over bumps, loose or wandering steering, uneven tire wear and a torn dust boot.
See the Buyer's Guide tab for every listed vehicle.
Interchange: FA87485 · MS40558
This part cross-references / interchanges with the following part numbers:
Which vehicles does the Dorman 544-845 fit?
It is listed for the 2020-2023 Ford Explorer and 2020-2026 Ford Police Interceptor Utility (engine: All) in the front lower position. These applications use two; this listing is for one.
Does the Dorman suspension ball joint come with hardware?
Yes, it includes a locking nut and a retaining ring. A castle nut, cotter pin, washers and mounting bolts are not included.
What do I need for a ball joint replacement on a 2020-2023 Ford Explorer?
This joint presses in with a 48.25 mm housing press-fit diameter, and a ball joint press tool is typically required. Consult the vehicle service information for the full procedure and torque specs.
Does this ball joint need to be greased?
No. It comes pre-greased with a polymer bearing and is not greaseable, so it has no grease fitting.
What are signs a ball joint may need replacing?
Common signs include clunking over bumps, loose or wandering steering, uneven tire wear and a torn dust boot. Diagnose the cause before replacing, since other suspension parts can cause similar symptoms.
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.