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What is the problem when there is abnormal noise from the brakes but it disappears after driving for two minutes with a warmed-up car?

2 Answers

McJessica

07/25/25 4:17am

The reason for abnormal noise from the brakes is the presence of foreign objects in the brake disc gap. Below are the specific causes and solutions: Foreign objects in the brake disc gap: Sometimes, hard substances like sand or stones can enter the gap between the brake disc and brake pads, causing abnormal noise. This usually occurs during the initial driving stage and can generally be ignored. After driving through water or off-road conditions like muddy roads, hard sand or stones may get into the gaps of the braking mechanism, causing jamming during braking system operation. When these particles move into the brake disc gap, they can lead to abnormal noise. Additionally, excessive wear on the brake disc or cracks in the brake pads, even if not severely worn, can also cause abnormal noise. Replacing a new brake disc: Abnormal noise from the brakes in a new car is normal and usually disappears after a running-in period of more than 200 kilometers, so there is no need to worry. Replacing new friction pads or a new brake disc may temporarily result in poor running-in with the friction pads, leading to abnormal noise.

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LauraFitz

08/10/25 5:20pm

As a driver with fifteen years of experience, I think it's quite common for brakes to make unusual noises when cold but disappear when the car warms up. Usually, it's due to moisture or slight rust on the brake disc surface in cold or humid conditions, which gets worn off after a few minutes of driving as friction generates heat. However, this minor issue shouldn't be taken lightly. I once encountered a similar situation, thinking it was no big deal, only to find out later that the brake pads were wearing unevenly. The problem was resolved after replacing the pads. I recommend having the brake system checked by a mechanic during regular maintenance, along with cleaning the dust in the caliper grooves to prevent dirt buildup from causing worse issues. Parking in dry places can also reduce moisture effects and prevent problems before they arise. In short, brakes are crucial for safety—even if the noise goes away after warming up, it's better to address it early.

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