What is a common sign of brake failure?

A soft or spongy brake pedal is a common sign of brake failure due to the possibility of air trapped in the brake lines, a leak in the brake system, or a failure of the brake master cylinder. When the brake pedal feels soft or spongy, it indicates that the hydraulic pressure needed for effective braking is compromised. This condition can prevent the vehicle from stopping properly and poses a significant safety risk, as drivers may not be able to exert enough force to apply the brakes effectively.

The other signs mentioned can also indicate brake issues, but they may not directly signify brake failure in the same manner as a soft or spongy pedal. For example, a loud grinding noise might suggest worn brake pads, while an illuminated brake warning light could point to various problems within the brake system that need attention. Increased stopping distance can indicate that brakes are not performing optimally, often a result of wear or inadequate engagement but may not specifically imply failure like the feeling of a soft pedal does.