Why Does the Brake Squeak When Pressed?
2 Answers
The reasons why the brake squeaks when pressed: 1. Use of low-quality or overly hard brake pads: If low-quality or overly hard brake pads are used, they will make noise when rubbing against the brake disc during braking; 2. Presence of sand or foreign objects between the brake pad and brake disc: Due to the unique design of disc brakes, some sand and foreign objects may inevitably get between the brake pad and brake disc, which can also cause abnormal noise during braking; 3. Severe wear of the brake disc: If low-quality brake pads are used or if hard foreign objects get between the brake pad and brake disc, it can lead to abnormal wear of the brake disc. If the brake disc is severely worn, it will also produce noise when braking.
I've also experienced squeaky brakes before and summarized several common possibilities: the brake pads have worn down to the warning shim, which is specifically designed to alert you to replace the pads; small stones are stuck between the brake pads and the disc; newly installed ceramic brake pads need a break-in period; the brake pads make particularly noticeable noises when there's water or frost on the surface; another easily overlooked issue is the lack of lubrication on the guide pins, which can cause grinding noises when they seize. By the way, especially after driving in the rain and leaving the car overnight, the first few starts the next morning are most likely to produce squeaks, but this usually disappears after driving a few hundred meters.
