Possible reasons for the rattling sound of a car on bumpy roads include: faulty shock absorbers, excessive clearance between the steering rod ball joint, and excessive clearance between the lower support arm.

Oil leakage from the shock absorber may cause oil seal gasket failure and require replacement of the shock absorber. When the clearance between the steering rod ball joints is too large, there may be steering wheel shaking and tire eating during turning. It is necessary to promptly go to a 4S shop or repair shop to replace the ball joints. The lower support arm is an important component for maintaining the elasticity of the vehicle body. Once there is excessive clearance or looseness, it should be replaced immediately at a 4S store or repair shop to ensure driving safety.

Absorber is used to suppress the vibration and impact from the road surface during the rebound of a spring after absorption. Widely used in automobiles to accelerate the attenuation of frame and body vibrations and improve the smoothness of vehicle travel. When passing through uneven road surfaces, although the shock absorber spring can filter the vibration of the road surface, the spring itself will also have reciprocating motion, and the shock absorber is used to suppress this spring jumping.