Which brake system component is primarily affected by deteriorated flexible hoses?

Deteriorated flexible hoses in a brake system can significantly impact brake feel. Brake feel refers to the driver's perception of the braking system's performance through the brake pedal. When the hoses are compromised—whether through wear, heat, or exposure to contaminants—they can swell or collapse under pressure, leading to a spongy or unresponsive brake pedal. This diminished feedback can impair the driver's ability to gauge braking effectiveness, resulting in a less precise control of stopping power.

The calipers, while affected indirectly by the pressure supplied through the hoses, do not directly denote the sensation experienced during braking. The same reasoning applies to the brake discs and hydraulic lines. While the hydraulic lines are essential for connecting components and transmitting pressure, the deterioration of flexible hoses specifically manifests in how the driver experiences braking. Thus, brake feel is the most relevant aspect impacted by deteriorated flexible hoses.