What Causes the Abnormal Noise When Braking and Releasing in BMW 3 Series?

[MacEllie]

BMW 3 Series abnormal noise when braking and releasing is generally caused by brake pads. Here is a partial introduction to the abnormal noise when braking and releasing in BMW 3 Series: Causes: For new cars, the brake discs and pads are brand new, so they need to be worn in. During this period, there may be abnormal noises when braking, which can be divided into vibration friction and sharp hissing sounds. These noises will disappear after a few hundred kilometers. In windy or dusty weather: Sand or dust particles may enter between the discs and pads, causing a hissing noise when braking. Solution: If the noise persists for a week or half a month and becomes increasingly louder, it indicates a fault with the brake pads. Otherwise, it may be due to other reasons, and the brake pads should not be mistakenly replaced. If a rattling noise occurs during sudden braking and the brake pedal feels vibrating, this situation can be ignored.