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How to Determine if the Control Arm is Broken?

1 Answers

VonCarson

07/29/25 11:58am

The failure of the control arm can cause the car tire to wobble, leading to abnormal tire wear, and it can also have a certain impact on driving safety. It is advisable to promptly visit a 4S shop for inspection and repair. Below is more information about the control arm: 1. The control arm (Arm-triangle), also known as the swing arm, functions to balance and support. When the car is driven on uneven roads, the tires move up and down, which is accomplished by the movement of the control arm. The tire is mounted on the wheel hub, which is connected to the control arm via a ball joint. Essentially, the control arm acts as a universal joint, maintaining connected movement even when the relative positions of the driving and driven sides change, such as during steering when the shock absorber is compressed, causing the A-arm to lift. 2. The control arm is connected to the subframe through the front subframe connection point hinge sleeve. The forces and impacts received by the wheel are transmitted to the car body through this hinge sleeve. The front subframe connection point hinge sleeve is a potential site for cracking. In the event of an "axle break" accident, it is highly likely to occur at the front subframe connection point hinge sleeve. Generally, manufacturers produce the control arm by welding two steel plates together to enhance its load-bearing strength.

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