my brake pedal has been going down to the floor for about the last 3 days. But they work most of the time, it only happens at random times. I heard that it might be a sign that my master cylinder is going out, my friend says i should just bleed the lines, because it might be air. Last time i touched my brakes was about 2 .5 months ago to swap out the rotors. what do you think i should do?

 

Air in the lines is not random, it's always there. It probably is your MC...

 

The same thing happened to my car.. its the MC..

Replaced it, and now the ABS light comes on at random times but the brakes still work.

GL

 

it sounds like your master cylinder is going out...