Reasons for Abnormal Noises When Driving on Bumpy Roads
2 Answers
Abnormal noises when driving on bumpy roads may be caused by the stabilizer bar. Here is an introduction to the knowledge about abnormal noises on bumpy roads: 1. Lower control arm issue: The function of the lower control arm is to support the tire. So how can it cause abnormal noises? There are two rubber bushings on the lower control arm, and another position is where a small ball joint is installed, which is mounted on the steering knuckle. Prolonged driving and steering can cause wear on the small ball joint and rubber bushings, resulting in excessive clearance. This leads to abnormal noises when driving on uneven roads. Replacing the control arm with a new one can directly solve the noise issue. 2. Shock absorber top mount: Its function is to provide cushioning and shock absorption. In other words, when the top mount is in good condition, driving over speed bumps or bumpy roads will give you a slight upward lift after the tire fully touches the ground, providing a particularly comfortable feeling.
I often drive on mountain roads, and the bumpy surfaces always cause squeaking noises. At first, I thought the suspension was broken, but upon closer inspection, it turned out to be metal clanging due to loose chassis screws. Later, I found that the shock absorbers were severely aged, with oil leakage and no elasticity, making the car noisier when bouncing. Insufficient tire pressure also increased friction. Another possible cause was loose interior plastic parts rattling on rough roads. Don’t underestimate these noises—they could be safety signals. Tightening or replacing parts promptly helps. I recommend visiting a professional shop for diagnosis. They use tools to test shock absorbers and suspension conditions, enabling a one-time check. Otherwise, long-term neglect can accelerate part wear and increase accident risks. Spending a little on maintenance is better than major repairs later.
