If the BMW 5 Series shock absorber is hard, you can buy a rubber shock absorber on the market, which can alleviate it to a certain extent. From the perspective of the material that produces damping, shock absorbers are mainly divided into two types: hydraulic and pneumatic, and there is also a variable damping shock absorber. The shock absorber is mainly used to suppress the shock and the impact from the road surface when the spring rebounds after absorbing the shock. When passing through uneven roads, although the shock-absorbing spring can filter the vibration of the road, the spring itself will reciprocate. The shock absorber is used to restrain this kind of spring jumping.
Due to the structure of the shock absorber of BMW 5 series vehicles, the entire shock absorber will be compressed when the vehicle passes through a bumpy road section, thereby compressing the external spring.