Why is there abnormal noise after replacing new brake pads?
3 Answers
Replacing new brake pads may cause abnormal noise due to the following reasons: 1. The brake pad material is relatively hard. 2. Improper installation of the brake system. Relevant information about brakes is as follows: 1. Braking mainly relies on friction, utilizing the friction between the brake pads and brake discs, as well as between the tires and the ground, to convert the kinetic energy of the moving vehicle into heat energy after friction, thereby stopping the vehicle. 2. A good and efficient brake system must provide stable, sufficient, and controllable braking force, with excellent hydraulic transmission and heat dissipation capabilities, to ensure that the force applied by the driver on the brake pedal is fully and effectively transmitted to the master cylinder and each slave cylinder, avoiding hydraulic failure and brake fade caused by high temperatures.
I just experienced the annoying noise issue after replacing my car's brake pads. It's actually quite normal to have some noise in the first few days after changing brake pads. This happens because the new pads have surface coatings or minor irregularities and need some time to wear in and fit snugly against the brake rotors. Just like new shoes that need breaking in, most noises disappear after driving about 100 kilometers. If dust or grease wasn't properly cleaned during installation, or if the brake rotors themselves aren't smooth, the noise can be more pronounced and persistent. Material matters too - brake pads with higher metal content tend to squeak more, while ceramic pads are quieter. I recommend braking gently and smoothly during the initial driving period to help speed up the bedding-in process. If the noise becomes particularly sharp and shrill or persists beyond a week, it's best to return to the repair shop immediately to check if the installation was done correctly, avoiding potential safety hazards that could affect driving safety.
I recently experienced some strange noises right after getting new brake pads installed, which really had me on edge. I asked a few car-savvy friends about it, and they all said it's normal for new pads to need a break-in period—nothing to worry too much about. The surfaces of the brake pads and rotors are like a first date; they need about 100-200 kilometers to properly sync up. However, if the installation isn't done carefully—like if the guide pins aren't lubricated or the anti-rattle clips aren't secured properly—the noise can be louder and more persistent. I once ignored this issue and later noticed accelerated wear on my brake rotors. Material choice also affects noise levels; hard, low-metallic pads tend to be noisier than ceramic ones. My advice is to monitor the noise for a few days after changing pads. If it gradually lessens, you're fine. Otherwise, get it checked at the shop ASAP. Safe driving isn't about taking chances—handling small issues promptly prevents bigger problems down the road.
