Soft brake pedal on Ford Focus - what's the cause?

Any ideas please on a soft/long brake pedal on a 2014 Ford Focus 1.6 diesel. I have bled the brakes and the pedal is better but then gets softer over the course of the next two/three weeks? I have checked the rear wheel cylinders for leaks and they seem ok. There is no loss of fluid either. I am puzzled by this, can you help?

Asked on 5 January 2020 by Yowox

Answered by Alan Ross
You say you have checked the rear wheel cylinders, did you check the front as well? In addition, have you checked all the associated brake hoses to ensure they are in good condition? Have you also had a brake fluid change at any time?

If all of the above is good then we would suspect that the brake master cylinder may be the problem and as such would suggest that you get it checked out at a local Good Garage:
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