What is an obvious indication that brake pads may need replacement?

• A. A high pitched squealing sound when braking
• B. A rattling noise from under the hood
• C. A diagnostic trouble code on the dashboard
• D. A loud knocking from suspension

Answer: (A)

When brake pads wear down to a certain thickness, many braking systems include a wear indicator that emits a high-pitched squeal during braking. That distinct squeal is designed to grab your attention and signal that the pads are nearing the end of their life and should be replaced before they wear down further or cause rotor damage. This makes the squeal the clearest sign among common car noises and indicators that the brake pads may need replacement. By contrast, a rattling noise from under the hood usually points to engine-related issues, a dashboard diagnostic code can indicate a wide range of problems, and a loud knocking from the suspension involves different components entirely. If you hear brake squeal, have the brakes inspected soon and replace worn pads to maintain safe stopping performance.