Why does the car keep buzzing after turning off the engine?

[StJeremiah]

The buzzing sound after turning off the engine is due to the high temperature of the coolant in the radiator, which causes the fan to continue working to cool it down. Below is relevant information about car modifications: 1. Concept: Modification refers to altering the exterior, interior, or mechanical performance of a vehicle produced by the manufacturer according to the owner's needs, mainly including body modifications and performance modifications. 2. Regulations: Car modifications relate to the vehicle's safety performance, and improper modifications can significantly impact safety. Before modifying a licensed vehicle, the owner must register and report to the vehicle management office. The modification can only proceed after the technical report is reviewed and approved by the office. After completing the modifications, the owner must also complete the modification change procedures at the vehicle management office.