What Causes the Abnormal Noise When the Car Bumps?
3 Answers
Car bumping with abnormal noise is caused by: loose screws connecting chassis parts, which need to be tightened. Shock absorber noise requires replacement of the shock absorber. The most severe case is abnormal noise from the car body, which necessitates changing the car. Abnormal noise at low speed: It is most likely the sound coming from the suspension. The car's suspension includes links, springs, shock absorbers, and stabilizer bars. If any of these components is abnormal, such as loose bolts, it may cause abnormal noise due to shaking. Loose engine belt: You can try pinching the drive belt with your fingers and then twisting it. Note that this operation should be performed when the engine is cool. The twisting angle should generally be below 90 degrees; otherwise, the tightness needs to be adjusted.
I've encountered the issue of strange noises when the car bumps quite a few times, and it's mostly due to problems with the suspension system. When the shock absorbers and springs age, or the control arms become loose, they creak when going over bumps, affecting stability. It could also be caused by rusted chassis screws or loosened fasteners due to wear. Not fixing it over time can accelerate tire wear and pose significant safety risks. If the car shakes when turning, it's best to get it checked at a professional repair shop immediately. Daily driving should avoid roads with many potholes, and regular chassis maintenance can extend component lifespan. Remember not to ignore such noises—they can worsen handling, especially during long-distance driving, where the risks are greater. Spending a little on prevention is better than breaking down halfway.
There are many possible causes for abnormal noises on bumpy roads, with loose body or chassis components being the most common. For example, an unsecured exhaust pipe will rattle; objects shifting under door panels or seats can also make noise when vibrating. If a wheel hub bearing is damaged, the wheel becomes unstable when rotating, producing a clicking sound when going over bumps. It's best to conduct a simple self-check after parking to see if any screws are obviously loose. Addressing issues early can prevent minor problems from turning into major faults, such as worsened handling or sudden failures. I usually ask the technician to check these details during routine maintenance—it saves time and effort while ensuring driving safety. Don't wait until an accident happens to regret it.
