What is the reason for the squeaking sound when the electronic handbrake is engaged?

[McAva]

This is a normal phenomenon. The electronic handbrake operates via an electric motor, so this unusual sound is simply the noise produced by the motor working. Below are specific details about the electronic handbrake: 1. Principle: The electronic handbrake is a technology that achieves vehicle parking braking through electronic control. Its working principle is similar to that of a mechanical handbrake, both essentially relying on the friction between the brake disc and brake pads to achieve the purpose of parking braking. The only difference is that the traditional mechanical handbrake lever has been replaced with an electronic button. 2. Function: The electronic handbrake, also known as the electronic parking brake system, combines the need for temporary braking during driving with the requirement for prolonged braking after parking, both achieved through electronic control. Additionally, it extends to the vehicle's auto-hold function, which allows the driver to avoid prolonged braking when the vehicle is parked, effectively preventing the vehicle from sliding.

[AnnieLee]

Last time when I pulled up the electronic handbrake in my car, it suddenly made a squeaking sound, which made me a bit nervous, so I went to ask a mechanic. He said the noise is mostly related to brake pad issues, such as excessive wear making them too thin or dust accumulation on the surface, or insufficient lubrication causing them to get stuck. The electronic handbrake has small motors and gear sets inside, and if maintenance is neglected, the increased friction during operation can easily lead to noise. Additionally, if the car has been parked for several days with dust buildup or in a humid environment causing rust, it might also trigger squeaking. For safety reasons, these small details shouldn’t be ignored. Usually, avoid frequent hard braking, and after parking on a slope, it’s best to re-tighten the handbrake to ensure it’s effective. If the noise occurs frequently, go to a professional shop immediately for inspection and part replacement to prevent major hazards—after all, brake failure is extremely dangerous.

[HaileyMarie]

I've encountered the issue of squeaking when pulling up the electronic parking brake several times while helping friends with car repairs. The main cause is likely in the transmission mechanism. When the electronic system drives gears or brake pads via a motor, friction noises are common if the grease dries up or parts age and rust, but don't take it lightly—prolonged issues can lead to jamming and parking brake failure. I recommend checking the thickness of the brake pads on the caster yourself while also listening for the source of the noise. If it's near the motor, it might be due to unstable power supply or wiring issues. Although electronic parking brakes are high-tech, they have a limited lifespan. Regularly applying lubricant or getting maintenance at a 4S shop makes them much safer. Don't cut corners, or you might end up stranded on the road, causing unnecessary trouble.

[AlinaLynn]

When I parked the car and pulled the electronic handbrake, it made a screeching sound that startled me. I immediately asked my car-savvy neighbor about it. He said it might be normal noise—newly replaced handbrake systems need breaking-in. As the gears rotate, reduced grease can cause sounds. However, it could also mean the brake pads are too thin or dust has accumulated, requiring cleaning. I always prioritize safety—I make sure the handbrake light is on every time I use it, and I pull it firmly on steep slopes. If the sound becomes frequent or louder, the gear assembly must be checked. Otherwise, if it fails to lock properly, the car could roll. Never delay—visit a professional mechanic promptly. Replace worn pads and maintain cleanliness to prevent accidents.