Keep your front suspension pivoting smoothly with the Delphi TC4281, a front upper ball joint that is a direct-fit replacement for the 2002-2005 Ford Explorer, 2003-2005 Lincoln Aviator and 2002-2005 Mercury Mountaineer. This suspension ball joint connects the control arm to the steering knuckle, so the wheel can steer and move up and down with the suspension. See the "Vehicles it fits" section for engine details.
Delphi's OE safety technology is fitted to millions of vehicles worldwide, and the company brings that OE expertise to its aftermarket steering range. Every Delphi ball joint is tested to extremes. The parts withstand temperatures below -40°C and above 120°C and are exposed to 720 hours of salt spray. Delphi's dimensional and material analysis aims for close compatibility between the OE part and the aftermarket part.
- Forged construction: made with high-quality forgings for increased strength and smooth operation.
- Chloroprene rubber boots: intended to improve durability and help protect against premature failure.
- Precision machining: machined to micron tolerances for smooth joint operation.
- Anti-corrosion protection: applied to each part to help prevent corrosion and give a clean appearance.
Signs this part may need replacing include clunking or knocking over bumps, loose or wandering steering, and uneven tire wear. If a worn front upper ball joint is causing the problem, the TC4281 replaces it.
Interchange: 539-992 · 1L2Z 3084-AA · 1L2Z 3085-AA
K80008 · MK80008 · X15BJ0138 · 539992 · 1L2Z3084AA · 1L2Z3085AA
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
539-992, 1L2Z 3084-AA, 1L2Z 3085-AA, K80008, MK80008, X15BJ0138
Frequently Asked Questions
What does a front upper ball joint do?
It connects the upper control arm to the steering knuckle. This lets the wheel pivot for steering and move up and down with the suspension.
Is this the right upper ball joint for a 2002-2005 Ford Explorer?
Yes. The TC4281 is listed as a front upper ball joint for the 2002-2005 Ford Explorer. Check the "Vehicles it fits" section to confirm your exact vehicle.
Does it also fit the 2002-2005 Mercury Mountaineer and 2003-2005 Lincoln Aviator?
Yes. It is listed in the front upper position for the 2002-2005 Mercury Mountaineer and the 2003-2005 Lincoln Aviator.
What are the signs of a worn ball joint?
Common signs are clunking over bumps, loose or wandering steering, and uneven tire wear. Other suspension parts can cause similar symptoms, so diagnose the cause before replacing.
How is this ball joint built?
It is made with high-quality forgings, chloroprene rubber boots and machining to micron tolerances. Each part also has anti-corrosion protection applied.
