Improper loading of automobile control arm may cause the following problems:

1. Instability of suspension system: Improper loading of control arm will affect the geometric structure of suspension system, resulting in incorrect wheel position and angle, which will further affect the stability of vehicle suspension system, leading to the phenomenon of shaking and bumping when the vehicle is driving.

2. Uneven tire wear: Improper loading of the control arm may lead to incorrect contact angle between the wheel and the ground, uneven contact area between the tire and the ground, uneven tire wear and shortened tire service life.

3. Decline in directional stability: Improper loading of the control arm may lead to inaccurate wheel positioning, which will reduce the directional stability of the vehicle, and it is easy to cause directional deviation or insensitive steering when driving.

4. Damage of suspension parts: Improper loading of the control arm may lead to excessive wear or damage of other parts of the suspension system, such as ball heads and suspension springs, and thus affect the normal operation of the whole suspension system.

5. Reduced driving safety: Improper loading of the control arm will affect the performance of the suspension system of the vehicle, resulting in a decline in the stability of the vehicle while driving, which is prone to the risk of losing control or accidents.

Therefore, in order to avoid the above problems, the control arm should be installed in strict accordance with the manufacturer's specifications and requirements to ensure that the installation position, angle and torque are correct and avoid problems caused by improper installation. If there is a problem with the loading of the control arm, it should be adjusted or replaced in time to ensure the normal operation and driving safety of the suspension system.