What are the causes of abnormal brake noise while driving?

[AxelMarie]

The causes of abnormal brake noise while driving are: 1. Improper installation of brake pads causing abnormal friction; 2. Hard objects such as sand, gravel, or metal fragments stuck in the brake pads; 3. Inconsistent size of the friction blocks in the brake pads or severe wear of the brake pads; 4. Insufficient break-in period for the brake pads. The materials used for brake pads include: 1. Asbestos, cellulose, sintered glass; 2. Carbon fiber friction materials; 3. Powder metallurgy friction materials; 4. Semi-metallic friction materials. The method for replacing brake pads is as follows: 1. Open the engine compartment to check the brake fluid level to prevent overflow during replacement; 2. Remove the wheel where the brake is located; 3. Remove the bolts of the brake caliper and take out the brake pads; 4. Install new brake pads, tighten the guide bolts, and complete the replacement.

[Nellie]

As someone who has been repairing cars for many years, I've seen too many cases of brake noise. The most common issue is worn-out brake pads that have become thin, with uneven surfaces or rust spots, causing squeaking during friction. Sometimes, it's due to warped or severely scratched brake rotors, or small stones and dust getting stuck, resulting in a screeching sound when braking. Driving in rainy weather is particularly prone to causing noise, as moisture makes the friction surfaces more active. For new cars or recently replaced brake pads, noise is common if they haven't completed the break-in period of a few hundred kilometers. Don't underestimate these issues—they can gradually damage the brake system or even lead to failure, which is extremely dangerous. It's recommended to check brake thickness and cleanliness every three months. If you hear unusual noises, safely pull over to check for debris. For more complex issues, visit a repair shop. Regular maintenance can save you a lot of trouble.

[StephanieAnn]

I've been driving for over a decade and have encountered brake squealing issues before. Last time it happened because the brake pads were nearly worn out and started scraping against the metal plate, making a terrible noise that scared me into slowing down to check. Another time after rain, the abnormal noise got louder, and it only went away after I drove to a car wash for a thorough rinse. Issues like warped brake rotors or oil contamination are also common. New brake pads need gentle driving for the first few hundred kilometers to break in properly. Make it a habit to check your brakes every month – don't wait for major problems to surface. Ignoring it not only costs more in repairs but could also lead to accidents on the road. Safety always comes first.

[DeFelicity]

Brake noise is no trivial matter, and I always remind my friends to pay attention. Typical causes include severely worn brake pads or foreign objects stuck in them, while warped or rusted discs can also lead to squealing. The issue becomes more noticeable in humid weather. Long-term neglect can degrade braking performance and increase risks. Upon hearing any noise, slow down and pull over. If everything seems fine after a quick check, you can continue driving, but it's best to seek professional inspection and timely maintenance.

[LaBrady]

Maintaining the brake system properly can prevent noise issues. From my experience, regularly cleaning brake components and removing dust and rust is most effective. New brake pads require a break-in period—drive gently and avoid sudden braking. Reduce frequent braking in rainy conditions to minimize noise. Don't ignore minor sounds; address them promptly to prevent worsening. These habits can extend lifespan and ensure driving peace of mind.