A little while back I noticed that sometimes just before I came to a complete stop it felt like the brakes disengaged and then engaged again. just for a split second. Kind of like abs pulsing but it didn't pulse it just let go once and it lasted a little longer than an abs pulse.

Any way as time went on it was happening every time I stoped. I checked my brake fluid and abs fluid. Abs was low so I filled it and presto the problem was gone.... for about 3 weeks. Now its started agin and abs fluid level never droped (i did over fill it a little does that matter? do you need to bleed it after filling?). I've notice now that it's started again my main brake fluid is low so i toped it up and now difference.

I took a look under the car and didn't see any visible leaks on any of the break lines.

Any thoughts would be appreciated thanks...

 

Have the brakes been changed and or bled recently (before it started doing this)? Is your brake fluid dirty? The master cylinder could be going out on you.

 

They were bled a week or so before they started acting weird. The fluid looks a little cloudy. How do I check the master cylinder?