Why does the Audi A4L make abnormal noises when passing over speed bumps?
1 Answers
The reasons for abnormal noises when the Audi A4L passes over speed bumps are as follows: Body noise: This issue is usually caused by insufficient body rigidity, leading to deformation of the vehicle while driving, resulting in friction or shaking between the doors and the frame, or friction between steel plates due to welding failures in certain areas. Applying adhesive strips on the doors and windows or placing rubber pads in the friction areas may reduce or eliminate the noise, but these are temporary fixes. Some vehicles have significant wind noise due to their design. If no additional items have been added, owners should not attempt to resolve it themselves. Additionally, loose body components can also cause abnormal noises, which can usually be fixed by tightening screws. Engine compartment noise: Some noise from engine vibration is normal, but certain unusual sounds may indicate potential faults. For example, a sharp belt squealing sound is usually caused by belt slippage; a sharp metallic sound during engine operation is often due to damaged bearings in the generator, water pump, or power steering pump; if there is a hissing sound from the engine, it may be due to a blocked exhaust system, vacuum tube leakage, or breakage. If there are abnormal noises inside the engine, these are usually major faults, and the vehicle should be sent for inspection and repair as soon as possible. Tire noise: Tire noise is rhythmic, and the frequency increases with speed. A dull "thumping" sound is often caused by deformed, bulging, severely worn, or underinflated tires; a "clicking" sound may indicate small stones stuck in the tire tread. If the tire makes a roaring sound and the body noticeably shakes or the vehicle pulls to one side, it is likely a tire blowout, and the tire should be changed immediately.
