Battery Coding and Reg requirements really needed?

[808tileguy]

Aloha

I have a 2014 x1 35i M Sport with 40,100 miles on her.



When starting the car all the lights die for a second before starting. Starts almost every 1st try but since this is the wife's car I want to replace the battery. I have had a lot Bmw through out my life. currently I have
2008 335i
2012 x5 50i
2013 x5m
2011 x5 35i

and of course the Baby X1.SIDE NOTE: two more and id have one for every day of the week

I think i replaced the battery on all of my current fleet ( except the X1 ) and I have never coded any of them ....

I cant think of any immediate issues , Maybe there is long term ones... but im a little skeptical on the whole registering and coding requirements

any thoughts , experience s , comments or even a educational bash or two is greatly appreciated

[Rake]

These cars have what is called a variable output alternator, as the battery life/capacity decreases the alternator recognizes that and will output more current to the battery to charge it. Suppose you put a new battery in without telling the vehicle that there is indeed a new battery. In that case, the alternator thinks that the new battery still requires the same charge as the old battery and you run the risk of overcharging the battery. This can cause various electrical issues and may cause more damage. I bought a good quality Bi-directional scan tool and "registered" my battery that way. If you are replacing the battery with a "like for like" all you will need to do is tell the vehicle a new battery has been installed, no coding necessary. It's a rather simple process and won't cost you $300+ at the dealership.

Let me be clear on what I mean by "registered". There is no coding involved it's simply hooking up the scan tool to the OBD and going through the steps on the scan tool to tell the car there is a new battery. The only time a battery would need to be "coded" is if you are switching from lead acid to AGM or vice versa.