Why is the engine noise of BMW 320li very loud?

[VanRose]

The reasons and solutions for the loud engine noise of BMW 320li are as follows: Poor fuel quality: When the car uses poor quality fuel, the combustion condition inside the engine will deteriorate, causing the engine to vibrate and produce noise. Replacing it with high-quality fuel can solve this problem. Loose engine mounts: Since the engine inside the engine compartment relies on components like engine mounts for support and fixation, if these parts become aged or loose, the engine will move during operation, resulting in noise. To solve this issue, simply tighten the engine mounts. Moving plastic parts: It could also be due to moving plastic parts inside the engine compartment, such as the engine cover or intake pipe. Once these plastic parts become loose, they will collide with the engine compartment, thereby generating noise.