If you replaced it yourself, were you careful to postion it away from the engine and related brackets one it's way to the gearbox? This hose moves under pressure a little and could have chaffed against something. It's very unusual to see a 'Factory BMW' P/S hose fail so quickly though I have seen 'aftermarket' replacements fail due to poor fitment because of poor pipe bending and 'cheap' construction....puzzling...............jeffb.