If a new car makes a "squeaky" noise when braking, it is considered normal because new brake pads need a certain break-in period. This is to increase the contact area between the brake pad and the brake disc, leading to better braking performance. However, other conditions, such as severe tire wear, foreign objects on the brake pads, incorrectly installed brake pads, mismatched pad models, or excessively thin brake pads, can also result in squeaky brake sounds. When a "squeaky" noise is detected while driving, it is essential to stop and check the cause promptly to eliminate any safety risks during the journey.
Foreign objects in the brake disc usually produce a sharp noise when braking. In extreme cases, sand or metal particles may have entered the brake system. For such situations, you can wash away the foreign objects on the brake disc using a high-pressure water gun during car washing. If not cleaned in time, it can accelerate the wear of the brake pads and may even damage the brake disc in severe cases.
Additionally, when vehicles drive on roads with standing water or in rainy and snowy weather, the presence of moisture between the brake disc and brake pad can also cause squeaky noises. It's worth noting that in heavy rain or on waterlogged roads, when braking, you may need to press the brake pedal twice. The first press might not have much braking effect due to the water on the brake disc, while the second press will exert more noticeable braking force. Therefore, drivers should stay extra attentive when driving in the rain.
Furthermore, some car manufacturers may include metal particles or powder in areas where the brake pads are thin. When the brake disc wears down to its limit, pressing the brake will naturally cause a "squeaky" sound. This serves as a safety warning to the driver, reminding them to replace the brake pads in time.
