1999 accord ex-V6 here.

I have had a lot of brake issues with my car. I took care of all those problems myself with the help of a friend.

1)Brake fluid needs to be replace about every two years! Moisture in the brake fluid line will boil under pressure and turn to gas. The gas is compressable and therfore you will feel the brake pedal go down all the way to the floor. This is what is refer to as air in the brake lines.

BLEEDING A BAD BRAKE FLUID WILL NOT FIX YOUR PROBLEM. WHEN BLEEDING, THE ABS MODULATOR WILL NEED TO CIRCULATED.

2)The rotors need to look smoth without strikes high/low spots (Runouts) on them. Strikes is an early indication for a problem. Either caliper sticking or not compressing enough.

3)Check the brake lines for weak spots or wetnes.

With brake issues, you really need to take care of it quickly.

Good luck!