Why Do Car Brake Pads Make Noise?

[LaCalvin]

The reasons why car brake pads make noise are: 1. Use of low-quality or overly hard brake pads; 2. Presence of sand or foreign objects between the brake pads and brake discs; 3. Severe wear of the brake discs; 4. Brake pad warning. Brake pads, also known as brake linings, are critical safety components in a car's braking system. The effectiveness of all braking actions is decisively determined by the brake pads. Brake pads are generally composed of a steel plate, an adhesive heat insulation layer, and a friction block. The steel plate is coated to prevent rust, and the coating process is monitored using an SMT4 furnace temperature tracker to ensure the temperature distribution during coating meets quality standards. The heat insulation layer is made of non-heat-conducting materials to provide thermal insulation.

[LaLola]

Ah, the screeching sound when braking always makes people nervous. I've personally experienced it - brake pads mainly squeal because they're excessively worn or have debris stuck on the surface. When the friction material wears down to a certain point, the metal wear indicator inside contacts the brake rotor, creating that grating noise. Also, after rainy days, moisture can cause rust on rotors and pads, resulting in high-pitched squeals during braking. This is no trivial matter - I make it a habit to check pad thickness monthly. If they're thin, replace them immediately to avoid damaging the more expensive rotors. As an urban commuter frequently driving in stop-and-go traffic with rapid brake wear, I recommend professional inspections at shops promptly - safety comes first! Neglecting this may increase stopping distances and risks. You can start by cleaning around the wheels yourself, but never procrastinate on brake issues.

[McJasper]

Brake pad noise is quite common. Having repaired my own car several times, I found there are mainly two reasons: either the brake pads themselves are worn out, or there are sand, stones, or rust on the surface. When the friction layer becomes thin, the metal backing plate inside will scrape against the disc, producing a sharp sound. Also, if the installation isn't tight and there's a large gap between the pad and the bracket, movement can cause noise. As a DIY beginner, I've tried spraying brake cleaner on the brake area, which sometimes removes foreign objects. But if the noise persists, it's best to measure the pad thickness—using a caliper to ensure at least 3mm remains. During inspection, don't forget to check if the wheel bearings are loose. Simple maintenance can save a lot of money; if it doesn't work, just replace them with a good set of pads—safe driving brings peace of mind. When parking, avoid keeping the brakes pressed for long periods downhill.

[DiRowan]

I get really scared when I hear the brakes squeak as soon as I get in the car. A friend told me it might be due to worn brake pads. I heard that when the pads wear down, the metal inside can scrape against the disc, making a harsh noise. Sometimes, the brakes also squeak when it rains because the discs and pads rust. When I was a beginner learning to drive, I got so nervous that I went straight to the repair shop. The technician said the pads were thin and needed to be replaced, otherwise, brake failure could be disastrous. I want to remind everyone not to ignore small issues—get them checked promptly to stay safe.