URGENT PROBLEM - loss of all brake pressure overnight
Hopefully one of you guys will be able to help me on this. I went to use my '01 147 Sele yesterday and there was zero pressure on the brake pedal. Got the AA out and the guy confirmed that all fluid has been lost but could see no trace on any wheel, nor on the pedal or underneath.
This made us think it was the master cylinder, but I think it is hugely unusual for a master cylinder to just fail - I have never heard of that happening on any type of car, especially not one that's not yet five years' old.
But the really strange thing is that the whole thing happened without warning. Before yesterday, I had no brake problems with the car whatsoever and certainly no soft pedal or no warning lights that brake fluid was low. The last time I drove the car (about a week ago) it was 100% fine, so WTF has happened?
I'm trying to find a garage to take it into today (live in Streatham, SW London, any advice greatly received) but it does scare me that the brakes could fail so completely - anyone else heard of this problem? Good job it didn't happen whilst I was driving...
One idea - could it have been the cold weather recently?
And one possible clue - the powersteering has been making some really bad noises recently until it's very warm - is it possible that a spray of brake fluid from the master cylinder onto the belt could be causing that and therefore has my fluid been going for a while? (but then, if so there was never a warning light and it's now all gone when the car was parked)
Any thoughts gratefully received.