What Are the Causes of Car Brake Failure?

2 Answers
VanBrooke
07/29/25 6:20am
There are several reasons that can cause car brake failure, including lack of necessary maintenance on the braking system, severe overloading, and improper operation leading to mechanical failure. Lack of necessary maintenance on the braking system: excessive impurities in the brake master cylinder, poor sealing, failure of the vacuum booster pump, overly dirty brake fluid or mixing different types of brake fluid causing vapor lock when heated, leakage in the brake master cylinder or wheel cylinders, or air leakage in the air reservoir or pipeline connections. Severe overloading: Under the effect of gravitational acceleration, the vehicle's inertia increases, directly leading to brake failure. Improper operation leading to mechanical failure: For example, prolonged downhill driving can cause the brake pads to overheat due to friction, carbonization of the brake drum, and complete loss of braking function. Correct measures to take after car brake failure: Detect the problem in time and slow down to stop the vehicle; do not continue driving at high speed. Use the handbrake appropriately to control the vehicle, avoiding pulling it all the way or too quickly. Shift to a lower gear to control the speed.
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DelXavier
08/12/25 9:47am
I usually commute by car and have driven different models. I've found that common causes of brake failure include: brake fluid leakage leading to insufficient pressure; severely worn brake pads that are too thin to be effective; warped or overheated brake discs affecting friction; hydraulic system failures like master cylinder issues making the pedal feel hard; thermal fade from repeated braking on long downhill mountain roads causing excessive heat; problems with the brake booster making it difficult to press the pedal; and common issues like aging wiring or electronic system failures. My suggestion is to check the brake fluid level monthly, repair any leaks immediately upon discovery rather than waiting for an accident while driving, and maintaining a safe distance is crucial.
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