I've had my brake master cylinder replaced about mid-way last year because it was leaking, but since then i noticed that the fluid level seemed to go down every month, ive put a whole bottle of brake fluid in the span of maybe 6 months. And now the party piece, took the car for a spin this morning, everything was fine, took it out 6 hours later, and the brake pedal was a spunge...and there was no brake fluid in the MC, i dont see any visible leaks around the cylinder, can anyone help me out as to what the problem could be?

 

Aloha pnomaster: Welcome to the forum, enjoy your stay, and hope we might be able to assist you. Have you checked to see if any of your wheel cylinders are leaking, do you see any fluid drops under your car. have you checked for leaks at the area of the master cyl and booster split. look at the brake calipers for leaks. 6 mos leak is a good leak visible or by smell.

 

i have the same problem as you. i am still trying to figure out what is the problem...

 

giveme5htp, have you checked the above items, also if there are any dripping on the inside of any 4 tires. if you smell fluid in the car, check under the carpets for fluid leak.