Reasons for Abnormal Noise During Slow Braking?

[SophiaDella]

There are several reasons for abnormal noise during slow braking: 1. There is sand or other foreign objects between the brake pads and brake discs; 2. If the noise is muffled, it may be due to issues with the brake caliper, such as wear on the sliding pins or detachment of the spring clips. 3. Braking after driving through water can also cause abnormal noise. 4. Excessive wear of the brake pads may expose the fixed points of the friction material, leading to noise when rubbing against the brake disc or brake drum. Below are some related solutions: 1. When a hissing sound occurs during braking, it is recommended to first check if there are any issues with the friction between the caliper, brake disc, and brake pads. 2. When a sharp noise occurs during braking, aside from the break-in period of new pads, the first step should be to check the brake pads for wear or foreign objects. If the brake pads are worn out, they should be replaced immediately. If foreign objects are found, the brake pads should be removed, the objects taken out, and then reinstalled. 3. When a muffled noise occurs during braking, check the brake caliper for wear on the sliding pins or detachment of the spring clips. If any issues are found, they should be replaced immediately. 4. When a rattling noise occurs during braking, check if any attachments on the brake pads are loose. The best solution is to reinforce them or replace the brake pads with new ones.

[LeMargaret]

My car always makes a squeaking noise when I brake slowly, which is quite annoying. The most common reason is that the brake pads have worn thin, and the metal part starts scraping against the brake disc. It could also be small stones or dust stuck in the brake system, especially when driving in dusty cities. Rain or humid weather can also cause metal rust, leading to strange noises. I encountered this issue myself and later went to the repair shop for a check. The mechanic said the brake pads needed replacement, and after replacing them, the noise disappeared. It's recommended to check the brake condition every 10,000 kilometers—don’t wait until it starts squeaking to take action, or it might damage the brake disc. Additionally, the noise is more noticeable at low speeds because the braking pressure is lower, while at high speeds, it may be masked. However, this is not a minor issue, as it can affect braking performance. Adding some brake lubricant during maintenance can also help.

[JacksonRose]

My old car always makes noise when braking during slow reversing, and it took several checks to find the root cause. Worn brake pads are the main reason—when the pads get thin, they produce a metal grinding sound. Or the brake discs might be warped, especially after prolonged driving on bumpy roads, which can cause grooves. Additionally, lack of lubrication on the guide pins can also cause squeaking, particularly more common in cold weather. Once, I added some specialized grease myself, and the noise disappeared. For prevention, regular inspections are crucial—I have the mechanic check the braking system every six months during maintenance. Dust buildup can also cause issues, so I’ve developed a habit of cleaning the tires when parking. Ignoring low-speed noises for too long can lead to longer braking distances, posing significant safety risks, so it’s essential to address them early.

[DiNevaeh]

My car's brakes squeak at low speeds. I've consulted experienced mechanics, and the main causes are worn-out brake pads or foreign objects stuck in them. When the hard spots on the pads contact the rotor, noise occurs. Moisture can also be a factor, especially the first brake application after rain, which may squeak but disappears after driving for a while. Insufficient lubrication of the guide pins is quite common, and spraying some lubricant can help. From my personal experience, once a pebble got into the brakes after driving in the countryside, and the noise stopped immediately after removing it. This issue is more noticeable at low speeds because the pressure isn't enough to automatically clear debris. Don't delay; if the squeaking persists, get a professional inspection to avoid costly rotor and pad replacements. Simple maintenance can prevent most issues.