What Causes Brake Noise at Low Speeds?

[SanJustin]

Brake noise at low speeds is likely due to severely worn brake pads, where the warning indicator emits a sharp sound to signal replacement. Alternatively, excessive wear on the brake discs or brake drums, making them too thin, can also cause noise. Another possibility is newly replaced brake pads not fitting properly with the brake discs or drums, resulting in point or line contact that generates noise. Below are detailed explanations: 1. Generally, issues with the caliper, brake disc, or brake pads can produce such noise. If the noise persists, the first step is to check for dragging brakes, as poor caliper retraction can cause prolonged friction between the disc and pads, leading to noise under certain conditions. If the noise occurs right after installing new pads, it may be due to a size mismatch between the new pads and the friction blocks. 2. This situation could also be normal noise during the break-in period of new vehicles. New brake pads and discs require a break-in process, and when braking, hitting a hard spot on the pad (due to the pad material) can produce such noise. Additionally, if sand or debris adheres to the brake pads or discs, it can also cause this type of noise.