What Causes the Rattling Noise from the Dashboard When Driving on Bumpy Roads?

[LaFrancisco]

When a car produces rattling noises from the dashboard on bumpy roads, it is mostly due to misaligned plastic molds or shifted installations, causing friction, squeezing, or loosening between components. To address this, locate the source of the noise, identify the friction points, and place rubber padding to isolate the contact. Solutions for dashboard rattling are as follows: 1. Drive slowly and listen carefully to pinpoint the noise location. Check if any foreign objects were accidentally placed inside, such as small wires in the toolbox, debris in the dashboard gaps, or surrounding clutter like panels or padding. If the noise persists after clearing these, it is likely caused by loose components from frequent use or improper installation during modifications. 2. During audio system modifications, check if screws were not tightened properly. Gaps between panels can be filled with silicone. Also, inspect whether the plastic ducts connected to the air vent adjustment mechanism have cracked due to thermal expansion or contraction. Additionally, the air ducts connected to the vents on both sides of the CD player, located internally, might also be the source of the noise.