Control Arm with Ball Joint Pair - 1ASFK00540

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Vehicle Fit

Part Details

  • Quantity:   Pair

These replacement front lower control arms with ball joints are just what you need to bring back the safety and integrity of your vehicle's suspension and steering.


  • Comes as a PAIR
    • Fits both LH (Driver Side) & RH (Passenger Side) FRONT LOWER
  • Includes Ball Joints & Bushings
  • Replaces dealer part numbers: 7L2Z3078AB, 7L2Z 3078 AB, 7L2Z3079AB, 7L2Z 3079 AB
  • Direct replacements
  • Built to strict quality control standards

Worn or loose bushings can cause excessive front tire wear, popping or creaking in the front end, extra play in the steering system, and pose a serious safety concern. Replace those control arms with the loose bushings with our high quality replacements.

Our control arms are designed to be direct replacements for the original factory parts.  They are 100% brand new and require no modifications for installation.  No special tools are required because all of the bushings come pre-installed.

Item Condition: New

Attention California Customers:

WARNING:  This product can expose you to chemicals including Chromium (Hexavalent Compounds), which is known to the State of California to cause cancer, and birth defects or other reproductive harm.  For more information, go to

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Removing the Wheel (0:46)
    • Loosen the lug nuts with the vehicle on the ground
    • Raise the vehicle with a floor jack
    • Secure the vehicle on jack stands
    • Remove the lug nuts
    • Pull off the wheel
  2. step : Removing the Sway Bar Links (1:13)
    • Hold the upper link stud with a 16mm wrench
    • Remove the lower nut from the link with a 16mm socket and ratchet
    • Remove the sway bar link
    • Tap the sway bar link out with a hammer if it's stuck
    • Remove the bushings and washers
  3. step : Removing the Control Arm (2:40)
    • Remove the 24mm bolt from the strut
    • Remove the 24mm lower ball joint nut
    • Strike the side of the steering knuckle with a hammer
    • Remove the 24mm nut fixed in the subframe on the rear of the lower control arm
    • Loosen the 30mm axle socket with a socket and 24mm wrench
    • Tap out the bolt
    • Pry the control arm down
    • Pry the control arm out of the steering knuckle
  4. step : Installing the Control Arm (4:46)
    • Install the lower ball joint into the knuckle
    • Hand-tighten the 24mm nut to the ball joint
    • Set the control arm into the frame
    • Set the rear bolts into the frame and control arm
    • Push down on the spindle
    • Line up the bottom strut bolt
    • Tighten the 24mm strut bolt
    • Tighten the 24mm bolt on the backside
    • Tighten the 30mm bolt on the backside
    • Torque the lower ball joint nut to 111 foot-pounds
    • Jack up underneath the knuckle to simulate the ride height
    • Torque the strut bolt to 248 foot-pounds
    • Torque the 30mm bolt to 296 foot pounds
    • Torque the back 24mm rear control arm to 148 foot-pounds
  5. step : Installing the Sway Bar Links (8:14)
    • Place a washer onto the link
    • Then a bushing
    • Place the link up through the control arm
    • Install a bushing with the tapered end down
    • Then a washer
    • Then the sleeve
    • Then a washer with the cup facing up
    • Then a bushing with the tapered end up
    • Insert the link into the sway bar
    • Install a bushing
    • Install a washer
    • Then tighten the nut with a 17mm wrench and a 16mm socket and ratchet
    • Lower the jack/weight from the suspension
  6. step : Reattaching the Wheel (9:43)
    • Slide the wheel into place
    • Start the lug nuts by hand
    • Tighten the lug nuts preliminarily
    • Lower the vehicle to the ground
    • Tighten the lug nuts to 100 foot-pounds in a crossing or star pattern

Tools needed for replacement:

    General Tools

  • Jack Stands
  • Hammer
  • Floor Jack

  • Materials, Fluids, and Supplies

  • Rust Penetrant
  • Safety Glasses
  • Gloves

  • Ratchets & Related

  • Ratchet
  • Socket Extensions
  • 1/2 Inch Breaker Bar

  • Screwdrivers & Related

  • Pry Bar

  • Sockets - Metric

  • 24mm Socket
  • 19mm Socket
  • 16mm Socket
  • 30mm Socket

  • Wrenches - Metric

  • 17mm Wrench

5.00/ 5.0
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I am really happy with my purchase from 1A auto. It was exactly how they said, new and a perfect fit and there were no issues with the wheel alignment after. I have been using 1A since my very first purchase since there has never been a problem. Good luck with your next project.
July 11, 2018
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Year Make Model Description
2006-2010Ford Explorer Ford Explorer Front Lower Control Arm with Ball Joint Pair
2007-2010Ford Explorer Sport Trac Ford Explorer Sport Trac Front Lower Control Arm with Ball Joint Pair
2006-2010Mercury Mountaineer Mercury Mountaineer Front Lower Control Arm with Ball Joint Pair
Part #: 1ASFK00540

Order must be placed by 4pm ET
Delivery options for:

Estimated Arrival Cost

Deliveries made to PO Boxes and FPO may take longer. See our Shipping & Delivery for more information.

Get it in: 2 - 4 Business Days

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How-to Video:

(10:28 min)