Just did this on my wife's 2008 328i. Also changed the reservoir to get a clean filter. The fluid was 10 years old and black! Two things I did differently than the original write-up. I did not use the banjo bolt to drain the fluid because I thought it was very difficult to reach from underneath the car and I was worried about being able to line up the gaskets and torquing it correctly after the drain. I used the small metal fluid line going into the back of the hydrobox which is very easy to disconnect and reconnect with a 12 mm wrench. The other change was that I used "normal" hose clamps for the lines to and from the reservoir and not the oe ones supplied by fcpeuro with the reservoir replacement kit because I didn't have the right crimping tool. Taking out the reservoir after draining the fluid out the bottom eliminated any mess in the engine compartment. This is not a terribly difficult job but my wife (who acted as my assistant) was very impressed with my wrenching skills!
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