Toyota Prius C brake pedal failure with significant brake fluid leak and no prior warning signs on Toyota Prius C

Some Toyota Prius C owners report experiencing significant brake fluid leaks without prior warning signs, which can introduce air into the brake system and lead to a soft or spongy brake pedal feel. Additionally, issues with the brake booster assembly may cause internal leaks, triggering warning lights such as ABS, TRAC, and Check VSC to illuminate. A failing brake actuator can also present various symptoms, including performance issues and warning lights. Furthermore, fluctuations in brake fluid levels due to wear on disc brakes can mislead owners into thinking there is a leak, potentially affecting the master cylinder. The presence of warning lights such as the emergency brake light, ABS light, and generic brake system warning light may indicate low brake fluid levels associated with a leak. Given the serious nature of these issues, immediate attention is necessary to ensure safety and proper functionality of the braking system.