Basic braking system would be much easier to handle. It cannot be a caliper fault as the fluid level is correct.
Only 2 things can cause this symptom.
1. Air trapped in system. If this is the case, the problem should be occurring more often and would usualy be the first stroke of the pedal after pedal had not been used for a while.
2. A bad master cylinder. I would go with this as per the symptoms and the reason is the quality of the part is suspect.
Perform this test and see what results you come up with.
Start engine and softly depress the brake pedal. When it stops moving, hold the pressure lightly and wait for a few seconds. Continue with a little more pedal moement and note if it continues to move. If not, back off pedal pressure lightly and depress again lightly. Repeat process of softly pressing and depressing at the point the pedal movement stops and note of the pedal height slowly sinks with each movement.
Monday, September 17th, 2012 AT 6:13 AM