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Brakes Slipping/malfunctioning

Motor Vehicle Maintenance & Repair Asked by Mena Labib on September 25, 2021

I recently got in a car accident because my brakes failed to work. It felt as if when I pressed them, they had slipped.
I tested the brakes after-the-fact to see what the problem was, and this problem happened 2/5 times I pressed the brakes. The other 3 times they worked fine. It’s not my pads or rotors, because I just changed those.
What is going on here?

It’s a 2005 Hyundai Accent.

One Answer

The most common cause of intermittent brake failure is a faulty master cylinder. The master cylinder is similar to a bicycle pump. It moves brake fluid instead of air. Stepping on the brake pedal moves a rod that pushes brake fluid to the wheels. If a seal is failing it may allow brake fluid to seep by it reducing the fluid pressure to the wheels. As an aside if you have it replaced you may be able shift the blame to mechanical failure instead of operator error. It may help avoid a insurance increase or traffic citation.

Correct answer by mikes on September 25, 2021

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