What to Do When a BMW Makes Abnormal Noises When Braking at Low Speeds?
2 Answers
Abnormal noises when braking at low speeds are likely due to severely worn brake pads, where the warning tabs emit sharp sounds to indicate the need for replacement. Alternatively, the brake discs or brake rotors may be excessively worn, becoming too thin and causing noises. Another possibility is that the brake pads have just been replaced and are not properly seated with the brake discs or rotors, leading to point or line contact that generates noise. Additional details include: 1. The replacement cycle for brake pads is not fixed and depends on the vehicle's driving conditions, the frequency and force of the driver's brake pedal usage. Generally, front brake pads wear out faster than rear ones, with front brake pads lasting about 30,000-50,000 kilometers and rear brake pads about 100,000-150,000 kilometers. 2. Typically, issues with the caliper, brake disc, or brake pads can cause such noises. If the noise persists, the first step is to check for dragging brakes, as poor caliper resetting can lead to prolonged friction between the disc and pads, producing abnormal noises under certain conditions. If the noise occurs immediately after installing new pads, it may be due to a mismatch in size between the new pads and the friction blocks.
The annoying squeaking sound when braking at low speeds in a BMW is really frustrating. I experienced it with my old 3 Series—every time I moved the car, it made that grating noise. It might be due to impurities in the brake pads or uneven wear, which is common when dust sticks to the rotors on rainy days. Check the brake pad thickness immediately; if they're thin, replace them. Cleaning debris with a damp cloth on the rotor surface can often solve the issue. Loose calipers can also cause vibration noises, so lubricating the pins to prevent rust is crucial. Safety comes first—if the noise is frequent during city traffic jams, it's best to visit a dealership to check the hydraulic system to avoid brake failure. Regularly washing the wheel hubs and performing maintenance every 20,000 km can extend component lifespan and save money. Don’t delay too long—repair costs won’t save much, and driving safety is the top priority.
