Keep the front left corner of your suspension located and pivoting smoothly with the MOOG CHASSIS control arm RK80040, a front left upper control arm with ball joint supplied as a single unit. It fits many vehicles, among them the 2003-2011 Ford Crown Victoria, 2003-2011 Lincoln Town Car and 2003-2011 Mercury Grand Marquis. See the "Vehicles it fits" section for the full list and engine details.
MOOG engineers its premium control arms for structural strength and corrosion protection:
- Carbon fiber-reinforced bearing: Induction-hardened studs add strength. A patent-pending carbon fiber-reinforced bearing reduces socket friction compared with typical non-reinforced bearings, for longer socket life.
- Optimized bushings: Designed for quiet operation and to resist wear, salt, road grime and oils.
- Structural strength: Heat treated to match or exceed OE requirements, which helps inhibit premature failure.
- Corrosion protection: Coated studs and an e-coated control arm help inhibit premature deterioration.
A laser-etched ID marks it as genuine MOOG, and it comes with the hardware needed for installation. Precision tolerances are intended to make installation and steering alignment easier.
This listing is for one front left upper arm. The right side is a separate part, and replacing both sides together is commonly recommended. Having the wheel alignment checked after installation is advisable.
Frequently Asked Questions
Will this Grand Marquis control arm fit my 2003-2011 Mercury Grand Marquis?
Yes. RK80040 is listed as a direct-fit front left upper replacement for the 2003-2011 Mercury Grand Marquis. The "Vehicles it fits" section shows every listed application.
Is this 2003-2011 Ford Crown Victoria control arm also listed for the 2003-2011 Lincoln Town Car?
Yes. It is listed in the front left upper position for both the 2003-2011 Ford Crown Victoria and the 2003-2011 Lincoln Town Car.
What does a control arm and ball joint assembly do?
The control arm links the wheel's knuckle to the vehicle and pivots as the suspension moves. The ball joint lets the knuckle pivot for steering and suspension travel.
Does MOOG RK80040 come with installation hardware?
Yes. MOOG states it comes with all necessary hardware for installation, and a laser-etched ID marks it as genuine MOOG.
What are signs the upper control arm may need replacing?
Signs include clunking over bumps, loose or wandering steering, uneven tire wear, and a torn ball joint boot or worn bushings. Other parts can cause similar symptoms, so diagnose the cause before replacing.
