[pmcmtnbkr]

So still on the original battery 2 winters later still no issue with slow cranking no start have load tested the battery several times everything checks okay. I happened to be in touch with bimmerlink on another issue i finally got some sort of answer on the odd state of charge and here it is
SG Software GmbH & Co. KG <support@bimmercodeapp.com>
Thu 4/21/2022 4:19 AM
Hi,
the state of charge is calculated by the IBS in the car and the internal calculation is unknown unfortunately.
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Kind regards / Schöne Grüße
Stephan Gauch
So I guess that answers the question this is an unreliable calculation. So do what makes you feel good about your battery, changing it out by this reading alone seems like a bad idea.and waste of $$$ So for me I will continue running this battery until it starts giving me a reason to change it. For those interested I continue to get state of charge readings from 65% to 85% for no rhyme or reason. I even coded a friends BMW when he changed out his battery to an H8 and his car registered a state of charge of 75% on a brand new fully charged battery.