Is it necessary to install engine sound insulation cotton for BMW X3?

[TravisFitz]

It is not necessary to install engine sound insulation cotton for BMW X3, as adjustments can be made from the driving controls. The functions of engine sound insulation cotton: Waterproof performance, preventing sheet metal corrosion: After soundproofing the doors, the sound insulation cotton is directly adhered to the door metal sheet. Utilizing the excellent waterproof performance of the sound insulation cotton effectively prevents moisture from coming into contact with the door metal sheet, thus providing rust prevention. Effectively alleviates metal fatigue in the chassis: The reason for metal fatigue is the uneven structure inside the metal, which causes an imbalance in stress transmission, with some areas becoming stress concentration zones. There are also many tiny cracks at the defects inside the metal. Under continuous force, these cracks will grow larger, reducing the areas in the material that can transmit stress until the remaining parts can no longer continue to bear the load, at which point the metal component will be completely destroyed.