Yippee ! 6 groove serpentine belt decided to let go this morning. At least it was in the hotel parking lot. No BMW dealers in Worthington, MN but O'riely's Autoparts ordered me a belt and it is supposed to be in town by 2:30pm this afternoon. Be nice to be able to find a decent how too article or video but cannot find 1 for the 2006 E53 4.4i. Guess I will just have to figure it out when the belt gets here. None of the pulleys feels damaged and all pulleys turn so nothing locked up. Inspect mor when I get home b have 3.5 hour drive to get their. Dont think the battery would last that long with no alternator turning.