Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. How to Buy a Good Quality Control Arm Assembly

How to Buy a Good Quality Control Arm Assembly

Control Arm Assembly

Did you ever wonder how your car’s tires can stay on the road when you go over potholes and other rough areas? Control arms are the answer. These pivot points in your car’s suspension system allow the wheels to move in proper relation to the body, and connect to the car between the suspension and the frame.

There are two different kinds of control arms. Double-wishbone utilizes A-shaped arms, typically two on each side of the vehicle – upper and lower. This is a more complex system than MacPherson struts, which use one, more rounded control arm in conjunction with an upper spring and telescoping strut.

Assemblies come in three different types

  • Unitized: this assembly has an integrated ball joint, so when one part goes, the whole thing gets replaced.

  • Bolt-in: MacPherson struts use these control arms, which typically come in the form a stamped body.

  • Press-in: these are usually used in larger vehicles and feature a larger ball joint than unitized.

When control arms go bad you’re going to know it. The car may squeak or make a knocking sound, or pull to one side or the other. You also may notice the tires wearing unevenly. This could happen due to normal wear and tear, or the bushing on the control arm may become compromised.

When shopping for your new control arm assembly you’ll want to look for sturdy enough materials at a price within your budget. This part endures quite a bit of stress so you want a durable product.

How to make sure you’re getting a good quality control arm assembly

  • Decide on materials. Cast aluminum control arm assemblies are lightweight and corrosion-resistant, however they tend to buckle more easily over rough potholes. Cast iron are exceptionally strong and are typically wishbone-shaped. Stamped steel were typically used on older cars. They’re more inexpensive but can easily fall prey to rust.

  • Look for OEM (Original Equipment Manufacturer) -comparable pieces if you’re going with aftermarket parts. High quality aftermarket parts can perform to the same level as OEM parts, just make sure to buy from a reputable seller.

  • Choose a control arm assembly that is powder coated or otherwise treated for corrosion resistance.

If you're still unsure of what to purchase, YourMechanic supplies top-quality control arm assemblies to our certified mobile technicians. Our mechanics can provide and install a new control arm assembly, or install one that you've purchased. Click here to get a quote for a control arm assembly replacement.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
Auto Safety Tips
Driving is more than a way to get from point A to point B. Owning and driving a car can also be a highly enjoyable experience. Whether a person is driving...


Related questions

Q: Violent shaking when hitting bumps at high speeds

Hi and thanks for contacting YourMechanic. The cause for the bouncing around the road is a loose suspension, loose steering, or failed shock. Check all of the suspension control arms and check the sway bars front and rear. Check the...

Q: There's a bolt broken off the rear upper control arm the cross member

It depends. If only a bolt needs to be replaced, the price "sounds" high but even that response is speculative because there might be a lot of disassembly work to get to the bolt and then, of course the wheel...

Q: Why is my expedition swaying under intial braking

It sounds more like you are having problems with one of the lower or upper control arm bushings allowing the wheel to shift to the rear when braking. If it is pulling more right, then the problem is in the...