Help keep your ride smooth and stable with the Dorman control arm P/N 521-879, a front left lower arm for the 2005-2007 Ford Five Hundred, 2005-2007 Ford Freestyle and 2005-2007 Mercury Montego. This Dorman suspension control arm and ball joint assembly directly replaces the original assembly on these applications. It arrives with its ball joint and bushings already installed, so it is ready to fit.
- Direct replacement: Takes the place of the original arm on the listed Ford and Mercury applications.
- Complete repair: Each assembly comes with a pre-installed ball joint and bushings, which saves time and labor.
- Quality engineering: Went through an industry-leading evaluation and testing process aimed at a smooth, stable and safe ride with directional stability and predictable dynamics.
- Durably designed: Additional coatings add rust and corrosion resistance.
The lower control arm connects the wheel assembly to the chassis. It lets the wheel travel up and down while holding it in position, and the ball joint serves as the pivot for steering and suspension movement. Signs this Dorman lower control arm may need replacing include clunking over bumps, loose or wandering steering, uneven tire wear, and cracked or torn bushings.
This listing is for the front left lower arm and is sold individually. Replacing both sides together is recommended. For engine details, see the "Vehicles it fits" section.
Interchange: 820-668210B · 622.61030
820668210B · 62261030 · TC6316 · CA16404 · 5F9Z3079BA · 8A8Z3C403A · RK621604 · GS40147 · CMS40147 · MCSOE125 · 2606722 · 9CB40149 · SK521879 · 1508013 · JTC2624
This part cross-references / interchanges with the following part numbers:
820-668210B, 622.61030, TC6316, CA16404, 5F9Z3079BA, 8A8Z3C403A, RK621604, GS40147, CMS40147, MCSOE125, 2606722, 9CB40149, SK521879, 1508013, JTC2624
Frequently Asked Questions
Does the Dorman 521-879 fit a 2005-2007 Ford Five Hundred?
Yes. The 2005-2007 Ford Five Hundred is one of its listed applications, in the front left lower position. Use the "Vehicles it fits" section to confirm your exact vehicle.
What comes with this control arm?
Each assembly includes a pre-installed ball joint and bushings. Having them already in place saves time and labor during the repair.
What does a lower control arm do?
It connects the wheel assembly to the chassis and lets the wheel move up and down while holding it in position. The ball joint acts as the pivot for steering and suspension movement.
What are signs the control arm may need replacing?
Common signs include clunking over bumps, loose or wandering steering, uneven tire wear, and cracked or torn bushings. Have the suspension inspected to confirm the cause before replacing parts.
Does the arm have any rust protection?
Yes. Dorman applies additional coatings to this assembly for rust and corrosion resistance.
