Is it normal for the electronic parking brake to make loud noises when engaging and disengaging?
5 Answers
This situation requires specific inspection. Some models of electronic parking brakes produce loud noises when new. It's best to compare with the same model. If the sound is the same, it's normal; if different, there might be an issue with the brake caliper. Below is extended information about electronic parking brakes: First, the reasons for the noise: The electronic parking brake makes motor noise when engaging and disengaging. This is the sound of the motor operating the rear wheel brake caliper or the tensioner, which is normal and no need for excessive concern. However, if other abnormal noises occur, the car should be inspected promptly to ensure driving safety. Second, the advantages of electronic parking brakes: 1. Easy operation: The biggest advantage of electronic parking brakes is their simplicity. Just flipping a switch can activate the parking brake function. Moreover, the settings of electronic parking brakes are more user-friendly, allowing them to be engaged under any circumstances. 2. High safety factor: If mistakenly pressed while driving, the electronic parking brake won't engage as the throttle is still in the working position. If pressed during emergency braking, the electronic parking brake won't lock the wheels but will provide stronger braking force to assist in stopping.
I've been driving cars with electronic parking brakes for years, and the startup and shutdown sounds are mostly normal. The buzzing sound is from the small motor inside working to tighten or release the brake pads. The volume varies between different car models; luxury cars might be quieter, while economy cars can be louder. For example, my friend's Volkswagen sounds like a buzzing bee—quite noisy—but it's always been reliable in operation. Unless the sound changes to a clicking or metal grinding noise, indicating the actuator is stuck or there's a brake component failure, which requires immediate repair, there's no need to worry. Consistency in the sound is key; if the volume is similar each time you operate it, everything's fine. Don't stress over normal noise—it's just how the car is designed. For extra peace of mind, have a technician check the wiring and fuses during regular maintenance.
A loud electronic parking brake sound is not uncommon; many new cars exhibit this. Operating it with the car doors closed in a garage makes the noise particularly noticeable, which is the electric motor brake actuator at work. Common causes include system design or high usage frequency leading to increased noise. If the sound suddenly becomes louder or is accompanied by a dashboard warning, it might indicate actuator aging or a short circuit; observe whether the car rolls on a slope. Try testing in different seasons: the sound is often louder in cold weather, which is normal. Don't scare yourself by constantly searching online—most cars' sounds stabilize with prolonged use. If necessary, visit a professional shop for a simple check-up; don't push it.
Loud noise is usually fine, as the electric motor mechanism of the electronic parking brake can produce noticeable sounds during activation and deactivation. The key is to identify abnormalities: humming is normal, but harsh scraping noises may indicate actuator failure or dirty brake discs. Check the fuses and relays; unstable voltage can also amplify the volume. Safety first—if the noise is accompanied by parking brake failure, pull over and find a mechanic. Regular maintenance and system cleaning can reduce the occurrence of issues.
The electronic parking brake relies on a motor to drive the actuator, producing operational sounds. When activating to tighten the brake pads, the motor rotates with a sound resembling a beep; the release sound is louder during retraction. Design variations are significant: some Japanese cars produce louder sounds, while German cars are quieter. High volume is generally within the normal range. However, if the noise is harsh or intermittent, it may indicate gear wear or poor wiring contact causing misalignment. Familiarize yourself with your car's usual noises; smooth operation means no major issues. Only when it fails to function should you be concerned.
