During a brake inspection, which issue should be addressed immediately?

Visible cracking on brake pads is a serious issue that needs to be addressed immediately because it directly compromises the braking system's effectiveness and safety. Brake pads are designed to create friction with the rotor in order to slow down or stop the vehicle. If there are cracks in the brake pads, it indicates potential failure or reduced performance. Cracked pads may break apart during operation, leading to a complete failure of the braking system, which can cause accidents or loss of control while driving.

In contrast, light dust accumulation on rotors is common and typically does not pose an immediate threat to brake performance. Minor rust on brake shields, while it may require maintenance over time, generally does not affect braking capability unless it becomes severe. Brake fluid discoloration is a sign that the fluid may need changing, but it is not as immediately critical as the structural integrity of the brake pads themselves.