Originally Posted by crashoverride
I just replaced my 2006 330i battery I was convinced I would need to register battery after getting a replacement from sears.... Turns out for 2006 battery doesn't need registering if you stick with same battery. No error codes.
It's confusing as they used three different batteries and there all interchangeable sometimes depending on what vendor they will tell you that such and such battery will not work when it does.
Sorry boss, you still need to register it for best chance at a long life..it is still using the adaptations from the old battery..might not throw codes but is probably not using optimal charging profile.