Call whichever vender you like to order the master cylinder and they will explain everything you need to know over the phone. That is one of the "free" services you get when you order parts from them. The vender may also warn you about the possibilty of having to rebuild all of the calipers on all 4 wheels too. The brake fluid is supposed to be changed every 2 years so as to prevent moisture from accumulating in it and then corroding the bores of the master cylinder and the calipers. You might luck out and after changing the master cylinder and bleeding and flushing the fluid the calipers won't leak or they may be alright for a while and then start leaking. The safe way to go is to just do the entire brake system once and for all. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, Soma576@xxxx wrote: > Hey all, > > seems as if over the winter my master cylinder has begun to seep. there is > no fluid on the frame or the floor (that i can find) but the cylinder is > glistening with what can only be brake fluid. the fluid level is low too. > the plastic reservior, the cylinder, and the servo unit look wet -