Why is there a noise when braking?

[DelOscar]

Brake noise in a car is caused by worn brake pads that need timely replacement. Brake pads are consumable items, so they gradually wear thinner with vehicle use. When the friction layer is nearly depleted, an alarm device called the wear indicator (a small metal tab on the brake pad edge) will contact the brake disc, producing a sharp metallic scraping sound as a warning to the driver that the brake pads require replacement. Typically, brake pads should be replaced every 60,000 to 80,000 kilometers, while brake discs last 100,000 to 120,000 kilometers. Improper installation (such as reversed mounting) or incorrect brake pad specifications can also cause abnormal noises - in such cases, the pads should be reinstalled. When replacing brake pads, owners should always visit professional auto repair shops, especially those who previously had brake pads replaced at roadside stalls should pay particular attention to this.

[DelValentina]

I experienced brake squealing when I first started driving. I remember my old car would squeak every time I pressed the brake, which was quite annoying. The main reasons were severely worn brake pads from prolonged use or accidentally getting a small stone stuck in them, causing friction noise. Some cars also do this on rainy days or in humid conditions, and rusty brake discs can cause abnormal noises too. It's best to first identify the type of sound: light rustling may be fine, but sharp noises require immediate inspection. Later, I made it a habit to clean the brake components during every car wash to reduce debris, and regularly maintained the vehicle by having mechanics check brake pad thickness to avoid mid-journey surprises. This issue shouldn't be delayed as it affects driving safety – imagine the danger if brakes fail during high-speed driving. I recommend developing the habit of addressing it early.

[McBlakely]

I often work on my car myself. For issues like brake noise, start with the simplest checks. Start the car and listen for the noise location. If it's a creaking sound from the front wheels, it's likely the brake pads are worn thin. For the rear wheels, it might be debris stuck in them. There's not much you can do yourself, but grab a flashlight to check the remaining thickness of the brake pads—if it's below 3mm, it's time to replace them. Don't attempt repairs directly, as it involves electrical hazards. It's safer to buy new pads or have a small shop handle it. Pay extra attention to brake disc corrosion during the rainy season; spraying some rust inhibitor can help prevent it. In short, don't ignore small noises, or you might end up spending big on repairing the entire brake system due to severe wear.

[HarmonyAnn]

The screeching sound of brakes makes me nervous. Last time, my friend ignored the squeaking noise from his car, and the brakes failed—fortunately, nothing serious happened. Different sounds indicate different issues: a sharp, piercing noise suggests the brake pads are nearly worn out; a rustling sound might mean rust or dirt on the rotor; a clunking noise could indicate loose brackets. New cars sometimes make noise too, which is normal during the break-in period, but older cars are riskier. Immediately find a safe spot to stop, turn off the engine, and inspect. Make it a habit to check brake fluid and pad/rotor condition every 5,000 km—replacing worn parts early saves major trouble. Safety first—never gamble by driving with potential brake issues.

[MacElena]

The braking system, simply put, is about two parts rubbing against each other to slow down, just like the sound of shoe soles scraping the ground. Normal friction is mild, but when my car makes loud noises, it could be due to hardened or uneven material on the pads, causing uneven friction and noise; impurities getting in can also cause scraping. Another common issue is rust or pits on the disc surface, leading to strange noises when braking. Improper assembly in new cars can also cause this. Don't just look at the surface—it affects braking distance and stability, especially under heavy loads or downhill pressure. I recommend a simple monthly cleaning of dust buildup around the wheels and a thorough professional inspection for peace of mind.

[DiGavin]

After driving for so many years, my experience is that brake noises often start as minor issues but can escalate into major problems. For example, my old car initially just made a rustling sound, which I thought was normal in cold weather. However, the noise grew louder, and upon inspection, it turned out the brake disc had rusted with grooves. Another time, the noise was due to the metal shim in the brake pad hitting the limit, signaling it was time for a replacement. Pay attention to changes in sound during daily driving: light braking noises might not be a big deal, but loud noises during emergency braking are urgent. Don’t skimp on regular maintenance—choosing wear-resistant brands when replacing pads can help. Sharing this lesson is to remind everyone not to overlook brake issues; early repairs mean early safety.