One of the scariest moments that can happen while driving is when you try to stop and your break pedal sinks to the floor. When customers are experiencing this issue their descriptions of the problem resemble the following.
- While I was stopped at a traffic light my brake pedal’s hardness seemed to fade away, but the next time I stopped the brakes seemed fine.
- I heard a humming noise in my vehicle for most of the day. Finally, after turning a sharp corner, my brakes sunk to the floor.
- The road outside of my daughter's dance class is very steep. While waiting to pick her up one day, I was holding the car with my foot brake. Suddenly, the pedal started to sink. I quickly put on the emergency brake, and that held fine. Today, my brakes are working normally again. What is going on?
- A few weeks ago I had a "complete brake job" done, but now, at times, my brakes are very low. Did they do a bad job?
This is just the tip of the iceberg when it comes to the type of things we hear from customers who have had the unfortunate experience of having their brake pedal sink to the floor.
Among the four examples listed above, three of them are most likely caused by the same culprit: the brake master cylinder.