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What Does the Upper Control Arm Do?

David Miller • • 7 min read
What Does the Upper Control Arm Do?
Auto experts say control arms connect the car's suspension to the actual vehicle frame. They are connected to the frame through a component called brushings, while they attach to the suspension through the ball joint. That allows the vehicle to turn its wheel and pivot, connecting the tire to the car's suspension.

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Likewise, is driving with a bad control arm dangerous?

Control arms have a very important role holding both front wheels on the road. If a control arm is excessively worn, damaged or bent, the vehicle is NOT SAFE to drive.

Also, what happens if control arm breaks while driving? The control arm bushings absorb the shock of road bumps. When it's broken or incapable of functioning, the vehicle will continuously vibrate at the time of driving. It will also cause the metal sleeves of the control arm rattle uncontrollably, creating annoying clunking sound coming from the front wheels.

Also to know, what are the symptoms of a bad control arm?

Here are the most common symptoms of bad control arm bushings and ball joints:

  • Clunking Noise. Specifically coming from the control arm and usually following a bump, braking, or a hard turn.
  • Steering Wander. Pulling to the left or right without input from the steering wheel.
  • Un-Even Tire Wear.
  • Vibration.

Do upper control arms make a difference?

The most common reason to replace a control arm is to improve wheel travel as part of a suspension lift. However, a new control arm can offer more than just increased ride height (lift) and additional wheel travel: Increased durability in the arm itself. A wider range of uniball/ball joint options.

Related Question Answers

Do you need an alignment after replacing control arms?

The need for an alignment after lowering the car is different from replacing the upper arms. If you are just replacing the upper arms, you shouldn't have to worry about an alignment unless your old arms were heavily worn and had significant play.

How much does it cost to replace a control arm?

The control arm should be repaired or replaced as soon as there's any sign of damage, and control arm replacements costs are typically $117 – $306 for the majority of vehicles. The part itself will normally cost between $42 – $103, with labor time usually an hour or two.
David Miller
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David Miller

David Miller brings 15 years of experience in global economics, personal finance strategy, and market dynamics. He specializes in turning complex economic trends into actionable insights for everyday readers.