
BMW X3 horn sound is low due to a malfunction in the amplifier equipment. Specific reasons: The malfunction in the amplifier equipment is caused by poor contact (loose connection), resulting in a buzzing noise in the car audio; if the buzzing noise increases with the throttle, it is largely due to grounding issues. Solutions: It is necessary to locate the loose connection and secure it properly. If the issue is with the horn, it should be handled by professionals. If the buzzing noise in the audio increases with the throttle, it is caused by ground potential difference, requiring amplifier grounding treatment. The process is complex, and if the connecting wires are problematic, it can lead to significant hazards. It is recommended to seek professional assistance.


