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I have a 2010 x5m and the dealer couldn't figure it out. Till one technician bleed the whole hydro system and replaced the pump. All turned out well but my thoughts is the pump goes out early and shows to be ok but is faulty. I say this because the dealer came back three times and said the pump was fine. Till they replaced and said yes it was faulty. It's very common in the X5M. Wish BMW would call it a recall, I talked with BMW North America LLC and they paid for 75 percent which is better than nothing
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