There are a few ways to get to it, mainly need to remove the cowl and wire harness above the engine. You can remove the battery and tray and reach back there to try and remove the bolts to it. Or, if youre like me, remove the cowl and harness, then the engine mounts to tilt the engine forward and down, thus giving you a decent amount of room to remove, install, and properly torque it.
http://www.realoem.com/bmw/showparts...61&hg=11&fg=15 #8 and 9 as well as new clamps