What Causes the Brake Noise in BMW 3 Series?
3 Answers
Brake noise in BMW 3 Series may be caused by excessive wear of the brake discs or uneven wear due to the owner's driving habits. It is recommended to have the vehicle inspected as soon as possible for brake disc examination, cleaning, or replacement to ensure driving safety. The relevant details are as follows: 1. Further Confirmation: The noise may be due to excessive wear between the brake pads and brake discs, or it could be an issue with the assembly of the brake pads. A more detailed diagnosis is required to determine the exact problem. 2. ABS: Noise may occur when braking because the ABS system is functioning normally. Excessive wear of the brake discs and pads can also cause noise. The actual working process of the ABS system in a car is a cyclic process of locking and releasing the brakes.
As a long-time BMW 3 Series owner who's driven it for years, brake squealing is an all-too-common issue. The most frequent causes are worn-out brake pads becoming thinner or scratched/uneven brake rotors creating squeaks during friction. It's particularly common after rain or car washes when surface rust temporarily forms. Newly replaced brake pads may also produce noise during the break-in period. Additionally, dust or gravel trapped between brake components can cause sounds. I make it a habit to regularly check pad thickness - replacement is generally recommended when below 3mm. Safety first! Never delay this - I advise having technicians measure brakes during routine maintenance to prevent accidents caused by compromised braking performance.
When I first drove the BMW 3 Series, the brakes kept squeaking, which really scared me. After checking some information, I found that the possible reasons could be that the brake pads were made of too hard a material—sometimes this is an issue with the original BMW pads. Alternatively, the brake discs might be uneven or worn out, making the noise more noticeable at low speeds or when stopping. Cold weather can also harden the rubber seals, causing friction. Once, I took it to a repair shop, and after they cleaned off the dust and applied lubricant, the noise stopped. It’s important to note that if the sound is sharp and frequent, it’s likely due to aging parts that need replacement. Never ignore unusual noises in daily driving—safety is no small matter.
