[Cdutch513]

Originally Posted by ctuna

If you are on the original battery the lifetime average on them
is about 6 years . Shorter if the car is allowed to sit or not taken
on decent sized trips now and then.

OBD port 12 volts is and always on connection.

electical e90 pdf
http://www.google.com/url?sa=t&rct=j...GU&cad=rja
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU

Should've been clear on battery replacement. My fault. I replaced the battery in August 2017.