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I should have done a better job at stating the correct technical words in my posts. Qsliver7 is correct about the "Register" and "Code".
In addition, you need to REGISTER your new battery with the instructions posted above and several people already pointed that out, too. This is easy for people that know how, but difficult without experience.
Furthermore, the memory saver connector the part guy plugged in didn't help. Don't let anyone mess with your car electronic unless they're certified BMW tech or a shop that knows and have equipment for BMW. I read some articles about that memory saver, and supposedly the experts against it. They stated it can damage your electronics.
I hope your case is just register the new battery to resolve it. GL
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