Why is there a squeaking sound when the brake is lifted?

[LaSabrina]

Here is the relevant introduction about the squeaking sound when the brake is lifted: 1. Normal brake noise for new cars: Generally, after running-in for more than 200 kilometers, the noise will disappear, so there is no need to worry. 2. Poor running-in: Replacing new friction pads or new brake discs, and the new brake discs cannot have a good running-in with the friction pads temporarily, which will cause noise. 3. Sand and gravel entering: Sometimes hard substances such as sand and gravel enter the gap between the brake disc and the brake pad, which will also cause noise. This usually occurs at the starting stage, and such noise can be ignored. Generally, after wading through water or driving on muddy roads off-road, hard sand and gravel will run into the gap of the braking mechanism, causing jamming when the braking system is working. When it runs into the gap of the brake disc, it will cause brake noise.

[LeNora]

I recently encountered a similar situation where my car made a squeaking noise whenever I released the brake pedal. This usually indicates a minor issue with the braking system. It could be dust or rust accumulated on the brake discs causing friction noise, especially common after rainy days. Another frequent cause is excessively worn brake pads or unevenly positioned shims, leading to metal-on-metal scraping. Sometimes dried-up grease on the brake calipers can also produce such abnormal sounds. I believe ignoring this problem could pose risks, like losing vehicle control during emergency braking, so I immediately took my car to the repair shop for a thorough inspection. They replaced the brake pads and cleaned the disc surfaces, and the noise disappeared. I recommend having your brake components checked every six months to prevent minor issues from turning into major expenses. Remember, safe driving is paramount - don't wait until the brakes fail completely before taking action.