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      10-22-2016, 11:33 AM   #59
Datka
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Drives: 2009 M3 ,2021 M340i
Join Date: Sep 2016
Location: Long Island, NY

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Quote:
Originally Posted by Richbot View Post
That's about where mine runs, for some reason my car has always run right around 14.0 on the dash hidden menus when running, sometimes high 13's, regardless of which battery is in the car. I have not checked with a voltmeter with it sitting engine off since I installed it

Those are the classic "car is trying to protect itself from an undervoltage" dying battery situation. I wonder if you don't have a module or door lock actuator not going to sleep properly or something, because my car can sit for a week and doesn't show any of the symptoms it used to have even with a new battery like loss of time on the clock etc.

My car does not have comfort access, iDrive or EDC so it's a pretty heavy sleeper if you will compared to the higher-spec cars. Wouldn't be surprised of a car with just because there are more computers talking to eachother
I have all those options you mentioned. Maybe more options has more trouble with parasitic draw running a lightweight battery like you said.
Never had to reset the date and time with 4 year old stock battery though.
Hope other owners tell us about their VPH-900 battery behavior.
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