How to Buy a Good Quality 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

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

Related articles

How to Replace a Control Arm Assembly
The control arms are a mounting point for the wheel and brake assembly. It need to be replaced if damaged or if bushings and ball joints are worn.
How to Replace an Air Suspension Dryer Assembly
The air suspension dryer assembly keeps air in the suspension system dry to prevent rust. Sagging or bounciness while driving are signs of failure.
How to Troubleshoot a Car Pulling to One Side
If your car pulls to the left or leans to one side, check that your tires are all the same size, suspension parts are even, and if springs are bent.

Related questions

Traction control sensor going off after installing lift kit
Hello. It is very possible that the larger wheels and tires that you put on your vehicle are causing the traction control to go off. The traction control is designed to work with the tires that came with your Jeep...
What causes rear suspension damaged out of sudden without hitting on anything, accident nor high speed bump?
The only common issue I found for the rear suspension is that the rear axle joints are prone to failure. Other than that problem there are no recalls or bulletins for anything else. If the problem was an axle then...
When I hit a little bump or pot hole on my right passenger front side, it feels like it skids a bit
The A6 has some pretty large bushings in the lower control arms. Especially the ones toward the rear of the arm. When those bushings wear out, the rear of the control arm can flop around quite a bit, changing all...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com