Brake dust is a fine powder that forms on the surface of brake components, such as brake pads and  brake rotors, as they wear down during normal operation. It consists primarily of tiny metal particles from the brake pads and rotor material, as well as other debris from the road surface. Brake dust can accumulate on wheels and other nearby surfaces, often appearing as a dark gray or black residue. It is a natural byproduct of the friction generated when brakes are applied and is typically harmless, although it can be unsightly and difficult to clean.

Brake dust is primarily caused by the wear and tear of brake components during the braking process. When you apply the brakes, the brake pads press against the brake rotors to create friction, which slows down or stops the vehicle. This friction generates heat and wears down the brake pads and rotors over time. As the brake pads wear down, tiny metal particles are released into the air as dust. 

Some of the main causes of brake dust include:

Yes! Cleaning brake dust is important to maintain the aesthetic appeal of your vehicle. Brake dust buildup can make your wheels and surrounding areas look unsightly. Regular cleaning helps maintain the appearance of your vehicle, keeping it looking clean and well-maintained.