Why Does the Brake Make Noise When the Car is Driving at Low Speed?
3 Answers
The reasons why the brake makes noise when the car is driving at low speed are: 1. There are foreign objects such as sand between the brake pads and brake discs, which increase the friction of the brake pads, resulting in a squeaking sound when braking. In this case, the foreign objects need to be cleaned promptly, and the noise will disappear; 2. If it is a muffled sound, it is a problem with the brake caliper, such as wear of the sliding pins or detachment of the spring plates; 3. Braking after the car has driven through water can also cause abnormal noise; 4. Excessive wear of the brake pads, causing the fixed points of the friction material to be exposed and rub against the brake disc or brake drum, producing abnormal noise. Braking, also known as deceleration, refers to the action of stopping or reducing the speed of running locomotives, vehicles, other transport tools, or machinery.
I've been driving for many years and encountered quite a few low-speed brake squealing issues. Common causes include worn brake pads or rust on the brake discs. When driving slowly, the friction between the pads and discs doesn't generate enough heat, which can lead to squeaking—especially on rainy days or when parked on wet surfaces where rust forms more noticeably. For example, back in my northern hometown during cold weather, the brakes would squeal when first applied in the morning, but cleaning off the rust helped. Another possibility is foreign objects stuck between the pads and discs, like small stones wedged in the gaps. If the pads wear down below 3mm, they're more prone to loud noises, and it's worth checking if the material is too hard or mismatched—OEM parts usually operate more quietly. Ignoring this can accelerate disc wear, leading to higher repair costs. It's best to visually inspect pad thickness yourself or have a professional shop check it. Safe driving shouldn't be taken lightly.
The squeaky low-speed braking is quite annoying. I just dealt with it last week. It's mainly caused by brake pads wearing thin and screeching, or slight friction noise from rust due to moisture on the discs. Parking in dry places helps reduce rust, and gently pressing the brakes a few times at low speeds often eliminates the noise. Accumulated debris like dust can also get stuck and cause noise – a simple solution is removing the wheel and blowing it clean. Pads typically last 50,000 km and should be replaced when nearing this limit. I usually avoid sudden braking to extend pad life, saving money and hassle. Fix issues early to prevent dangers at high speeds.
