What is the reason for the abnormal noise in the brakes of a new BMW X3?
3 Answers
There are many reasons for abnormal noise in the brakes of a new BMW X3, such as severe wear of the brake pads, excessive wear of the brake drum, etc. Severe wear of the brake pads: Abnormal brake noise at low speeds is likely due to severe wear of the brake pads. The warning piece will emit a sharp abnormal noise to prompt replacement, or the brake disc or brake drum may be excessively worn. If they are too thin, abnormal noise may also occur. Alternatively, it could be due to recently replaced brake pads that do not fit properly with the brake disc or drum, resulting in point or line contact and causing abnormal noise. Brake pads not replaced for a long time: The replacement cycle for brake pads is not fixed and depends on the vehicle's driving conditions, the frequency of the driver pressing the brake pedal, and the force applied.
As an experienced driver who has owned several new BMWs, I also had annoying squeaky brakes when my X3 was brand new. Brake noise is quite common in new cars, mostly because the brake pads and rotors need some time to break in, and there might be some dust or slight rust on them. The sound tends to be more noticeable in rainy or humid conditions. But don't worry too much—I usually recommend driving a few hundred kilometers first, and the noise often fades away gradually. If the squeaking persists, it could be due to overly hard brake pads or misalignment during installation, which would require a shop inspection. Remember, new cars come with warranties, so just visit the dealership for free repairs. Avoid sudden braking and maintain steady speeds to minimize noise. Safety first—if there's any issue with braking performance, address it immediately without delay.
I've worked in the repair shop for over a decade and fixed many BMW brake issues. There could be various reasons for brake noise in new cars, such as excessively hard brake pad material or small sand particles getting mixed in, which can cause screeching sounds during friction. Additionally, brake discs tend to rust during transportation, leading to squeaking noises when driving. This isn't a major issue, but it needs attention. I recommend first using compressed air to clean the brake system. If the noise persists, take it to a professional shop immediately for inspection, as there might be improperly installed or defective parts in the new car. BMW's brake system is quite sophisticated, and any issues can affect braking distance. By the way, regular maintenance is crucial, especially checking within the first 5,000 kilometers of a new car, which can prevent minor issues from turning into major faults.
