1. Gas leakage caused by damage to the airbag is the most common cause.
2. The aging and failure of the top rubber and buffer rubber is mainly reflected in the feeling of a hard object hitting the car on a bumpy road (the body hits the chassis) (the chassis does not touch the ground).
3. Damage and deformation of the bottom rubber will lead to loss of sealing.
4. Other conditions such as damage to the movement and oil leakage.