What might indicate a spongy feeling in the brake pedal?

A spongy feeling in the brake pedal typically indicates that there is air or gas in the brake lines or that the hydraulic system is not functioning properly. Low brake fluid level can lead to inadequate hydraulic pressure, which means the brake system may not be able to effectively transmit force from the brake pedal to the brake components. As a result, when the brake pedal is pressed, it may feel soft and spongy instead of firm, reflecting a lack of responsive braking action. Maintaining proper brake fluid levels is essential for the effective operation of the hydraulic brake system, as it ensures that all components are filled with fluid and free of air, thus providing the necessary pressure and responsiveness when braking.