Drove to work this morning, it is about 19 degrees outside, and the breaks were barely working. This was not a good trip. Usually I have to pump them once and they work great. This morning there would be no more pressure the second pump than the first. I am guessing the cold is affecting it. Also, I know there is a problem anyways because about 2 weeks ago it started leaking, very little, into the cab. The PO installed it very recently before I bought it a year ago. Isnt it failing a little prematurely? What do I need to fix the master cylinder? Thanks all.