ASE Brakes Certification Practice Exam 2025 – Complete Study Resource

Worn brake pads often lead to distinctive sounds that signal a need for inspection or replacement. The presence of a squeaking or grinding noise during braking is a clear indicator of this condition. As brake pads wear down, a built-in indicator—often a metal shim—may come into contact with the rotor, producing a high-pitched squeak to alert the driver that the pads have reached a certain level of wear.

In more severe stages of wear, if the pads are nearly gone, they can introduce a grinding sound, which indicates metal-to-metal contact between the rotor and caliper. This not only jeopardizes the effectiveness of the braking system but can also lead to rotor damage if not addressed promptly.

Other situations, such as a soft brake pedal feel or delayed response when braking, can indicate different issues within the braking system, such as air in the brake lines, low brake fluid, or other hydraulic problems. Consistent braking force is generally an indicator of a properly functioning system rather than an indication of wear. Thus, the presence of unusual noises directly correlates with brake pad wear, making this the correct identification of the problem.