Hi,

For the past 2 days I have noticed that if I am stopped at a light and i press my foot down on the brakes hard enough, the brake light will come on. However, the last 2 days my brakes seem to work as great as they always have. So, I'm guessing that it's time for a fluid flush. Any thoughts?
What are some symptoms that it may be the master cylinder?

 

either brake fluid is a little low or you will need brake pads soon.