The car lower arm is also called the car lower suspension. It is an important part of the car. Although the part is small, it plays an important role in supporting the body. It forms the suspension system together with the car's shock absorber and spring. The following introduces the function and precautions of the car's lower arm.

1. Buffer vibration. The function of the swing arm is to buffer the vibration of the car during driving. The shock absorber is used to cooperate with the swing arm to play a buffering role.

2, material, the material of the swing arm is more diverse, aluminum alloy, cast iron, double-layer stamping parts, single-layer stamping parts, all kinds of materials have advantages and disadvantages, stamping parts of the toughness is better, but the strength is not enough, easy to break under impact.

3. Anti-rust. Usually we can check whether the swing arm is rusty. The position of the swing arm is on the part connecting the front tire and the car body. It is easy to check. If you find rust, you must go to the 4s shop in time. Deal with it to prevent accidents from breaking.

4. Prevent the chassis from scratching. When we usually drive, we should be careful not to walk on uneven roads. Such roads are easy to scratch the ground, which not only damages the chassis, but also easily causes damage to the lower swing arm and cracks in the lower swing arm. Lower swing arm injuries are prone to steering wheel jitter, deviation and other phenomena.

5. Replace in time. When there is a problem with the lower arm, we must replace it in time, otherwise serious traffic accidents will occur. The service life of the lower arm of each car is different, and we have to replace it according to the recommendations of the maintenance manual or the 4s shop.

6. Four-wheel alignment. After replacing the lower swing arm, we need to perform four-wheel alignment on the car. The four-wheel alignment is to prevent the car from running off or eating tires.