What make are the master cyl & power booster?
You say that the wheel & master cyl's were replaced about 13 months ago & afterward everything worked fine. What are the symptoms you get that let you know the system needs service?
In your original post you say that the dealer has replaced the master cyl twice- does this usually put the systems to bed (for a while at least)?
Do you personally have a history with this unit or did you get stuck with someone else's ****? If you have a history, Has this unit always had a brake issue or is this something new?
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