I'm about to tackle the rear inner brake lines myself. Some of the info above will come in handy. Luckily I have the Stoptech lines so re-install should be fairly easy. It sucks that BMW didn't figure out a way to run the hard line an extra foot or so further so we could avoid these altogether. This is the first car I've heard of where these "extra" lines are used. I'm always nervous doing anything that requires breaking into the closed brake fluid system for two reasons...one is I always, always feel like I'm going to let the master cylinder run dry and the other is that brake fluid being so dangerous around paint always makes me worry I'm going to get a bit on something while frantically trying to keep the mess it creates contained. While either of these has yet to happen to me, it's always at the front of my mind
