Help keep your front suspension steady and predictable with this Dorman control arm, part number 521-015, a front left upper arm and a direct-fit replacement for the 2004-2006 Ford Expedition. It arrives with the ball joint and bushings already installed and is designed to directly replace the original assembly on the listed application. For engine-level details, see the "Vehicles it fits" section.
The control arm connects the steering knuckle to the vehicle's frame, letting the wheel travel up and down while holding it in position. The ball joint is the pivot point that allows the knuckle to turn when you steer. As a Dorman suspension control arm with the joint already in place, it lets you replace the arm and ball joint in one step.
- Direct replacement: designed to take the place of the original assembly on specific vehicle applications.
- Complete repair: the ball joint and bushings come pre-installed, which saves time and labor.
- Tested engineering: the design went through Dorman's industry-leading testing process, which aims for a smooth, stable ride with directional stability and predictable handling.
- Corrosion protection: additional coatings help the arm resist rust and corrosion.
Signs this arm may need replacing include clunking or knocking over bumps, loose or wandering steering, uneven tire wear, and a worn ball joint or bushings. Because other suspension parts can cause similar symptoms, diagnose the cause before you replace anything. Consult the vehicle service information for the correct fasteners and whether they can be reused, and check the wheel alignment after installation.
Interchange: 810-96644B
81096644B · TC6140 · CA8558 · 4L1Z3085AA · 6L1Z3085AA · RK80713 · RK80719 · FA4456 · GK80719 · GS40110 · CMK80719 · CMS40110 · MCSOE166 · 2605560 · 2607390 · 8CB40086 · 8CB40138 · SRK80719 · 2L1Z3085L
This part cross-references / interchanges with the following part numbers:
810-96644B, TC6140, CA8558, 4L1Z3085AA, 6L1Z3085AA, RK80713, RK80719, FA4456, GK80719, GS40110, CMK80719, CMS40110, MCSOE166, 2605560, 2607390, 8CB40086, 8CB40138, SRK80719, 2L1Z3085L
Frequently Asked Questions
Does this fit the 2004-2006 Ford Expedition?
Yes. 521-015 is listed as a direct-fit replacement for the 2004-2006 Ford Expedition in the front left upper position. See the "Vehicles it fits" section for engine details.
What comes with the Dorman suspension control arm and ball joint assembly?
The arm arrives with the ball joint and bushings pre-installed, so you don't need to press in a separate joint or bushings during installation.
Which position is 521-015 made for?
It is cataloged for the front left upper position on the listed application.
What are signs an upper control arm may need replacing?
Common signs are clunking over bumps, loose or wandering steering, uneven tire wear, and a worn ball joint or bushings. Diagnose the cause first, because other parts can cause similar symptoms.
Is a wheel alignment needed after installing it?
Checking and setting the alignment after replacing a control arm is standard practice. Follow the vehicle service information for torque specs and for whether fasteners can be reused.
