Foshan Bohua Auto Parts Co., Ltd.
Control Arm

Control Arm

Control Arm is a suspension component used in automobiles that connects the wheel hub and chassis. It is designed to reduce vibration and improve cornering and handling. Its design helps reduce unwanted suspension movement, resulting in improved ride comfort and increased safety. It is made from robust materials such as steel, aluminum or composites, and is typically connected to the wheel hub using ball joints. Control arm is an important part of a car's suspension system and helps to keep the car stable and balanced on the road.

Types of Control Arm

Functions of Control Arm


Control arms provide the connection between the vehicle's frame and the suspension. They serve as a pivot point for the suspension to move up and down, allowing the wheels to move freely and absorb the shock of bumps in the road.


Control arms are also important for stabilizing the vehicle. They keep the wheels aligned, preventing sway and roll, and help maintain the car's balance while cornering.


Control arms also assist in steering, providing the connection between the steering knuckles and the frame. They transfer the torque from the steering wheel to the wheels, allowing for smooth and precise movements.

How to Replace a Control Arm?

Replacing a control arm is a relatively straightforward task that can be completed in a few hours with the right tools and a bit of patience. Before beginning the task, make sure the vehicle has been safely lifted and securely supported on jack stands.

Begin by disconnecting the sway bar link and brake caliper bracket from the control arm. You may need to loosen the nuts and bolts with a wrench or ratchet. Next, disconnect the ball joint from the steering knuckle by using a ball joint separator. Now that the control arm is disconnected, remove the bolts and nuts that hold it in place and remove the old control arm.

Install the new control arm by threading in the mounting bolts and nuts. Make sure the control arm is aligned properly and the bolts are tightened securely. Reattach the ball joint to the steering knuckle and then reconnect the sway bar link and brake caliper bracket.

Finally, check the control arm's bushings and ball joint for any signs of wear and tear. If necessary, replace them before lowering the vehicle to the ground. With the new control arm securely in place, the vehicle is ready for use.

The Importance of Maintaining Your Control Arm

Maintaining your control arm is essential for a variety of reasons. It is the most important part of your vehicle's suspension system and serves to keep the tires in contact with the road. Without a properly maintained control arm, your car will experience excessive wear to the tires and suspension components, which can lead to decreased performance. Additionally, it can cause expensive repairs and potentially dangerous driving situations.

Maintaining your control arm includes regularly checking the bushings and ball joints for wear and tear, and replacing them as needed. You should also make sure the control arm is free of rust and corrosion, and that the mounting points are securely attached.

Regularly lubricating the control arm and suspension components is also important for keeping the system running smoothly. If the control arm is allowed to become dry, it can become brittle, leading to premature failure.

In addition to regular maintenance, it is important to have your control arm inspected regularly by a professional. This will help ensure that any problems are addressed before they become serious.

Taking proper care of your control arm is an important part of maintaining a safe and reliable vehicle. It also helps to improve performance and fuel efficiency. By making sure your control arm is in top condition, you can avoid costly repairs and ensure that your car is running smoothly.

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