If you use the search engine on the site you would find a million battery issues. This is a VERY common issue with BMW's because of the amount of electronics running when the car is off. If the car sat for a month, that could drain the battery. Though they usually don't go as new as yours, it hasn't not happened.

BMW will cover everything if your X is still under warranty. It is not your alternator (since you didn't post the year/model of your X is is hard to tell if a warranty covers it or not).

__________________

An unwavering defender of those I see worth protecting.

"promote the general welfare, not provide the general welfare"

We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.