Is it normal for the electronic parking brake to make loud noises resembling motor sounds?

[DiDerek]

It is normal for the electronic parking brake to make loud noises resembling motor sounds. Function of the electronic parking brake: The electronic parking brake is used for braking when parking on flat or sloped surfaces to prevent the vehicle from moving unintentionally when unattended, thereby avoiding traffic accidents. The parking effectiveness of an electronic parking brake is far superior to that of a mechanical handbrake. Traditional mechanical handbrakes carry the risk of failure due to issues with the handbrake lever or cables, leading to unintended vehicle movement. In contrast, the electronic parking brake directly clamps the brake disc through gear rotation and locks it in place, ensuring it does not release unintentionally, even in the event of a power loss. Additionally, the electronic parking brake serves as an emergency braking mechanism when the foot brake fails. Mechanical handbrakes can cause the rear wheels to lock up, leading to vehicle skidding. However, the electronic parking brake incorporates ABS functionality, allowing the wheels to remain in a semi-rolling, semi-sliding state during emergency braking. This not only enhances braking effectiveness but also maintains vehicle stability, ensuring safety. Electronic Parking Brake System: The braking force of the electronic parking brake system is adjustable to match the requirements of longitudinal incline settings. When starting or accelerating the vehicle, pressing a button or lightly tapping the accelerator automatically releases the locked brake. For drivers, the introduction of the electronic parking brake enhances driving and operational comfort and convenience. By replacing the traditional handbrake lever with an easily accessible electronic button, the system eliminates the need for drivers to exert force to pull the handbrake lever, making it simple and effortless. During traffic congestion, it reduces the burden on the right foot and hand, preventing inconveniences caused by insufficient force to tighten the handbrake properly.

[DeDamian]

I've been in the auto repair business for over a decade, and it's actually quite normal for the electronic parking brake to make some motor noise during activation or release. The electric motor is the core component that pulls the brake system, producing a buzzing or slight rumbling sound - this was accounted for in the design, especially during cold starts or repeated operations where slightly louder volume is acceptable. However, if the noise becomes abnormally harsh with metallic scraping or continuous clicking sounds, there may be underlying issues like insufficient gear lubrication, loose wiring connections, or unstable motor voltage, which could lead to parking brake failure and accidents. I recommend regularly checking if the indicator lights function properly. If the noise becomes excessively loud, immediately visit a professional repair shop for comprehensive inspection - don't wait until an accident occurs. Regular vehicle maintenance with proper component lubrication can minimize such problems.