They usually don't fail immediately but when leaks occur, fluid level would go down and air would get into the system resulting in low pedal height.
Check the fluid level and if it is low, top it up and pump the pedal a few times. If it does not response, try bleeding the system. This is only a temporary measure as you need to get the leak rectified, which should be from the slave cylinder if it is at transmission side.
If that is the problem, it is best to get the master cylinder repaired/replaced as well as it should be on its way out soon.
Sunday, March 18th, 2012 AT 8:21 PM