I have just replaced my power steering hose for the second time in a month. I used the official BMW high pressure hoses that are called for on my 735i. Could the problem perhaps be the power steering pump? (I'm thinking that maybe it's putting out too much pressure which is what is causing the hoses to burst). If so, anyone have any idea about how much it will cost to get a new pump? If you think it may be something other than the pump, what would you suggest it may be?