Battery coding (again)

[AdL]

So what actually happens if you dont 'code' a new battery? I need to replace mine but don't have VCDS or Carista. T6 2018 150hp DSG.

 

[Sasquatch]

If you mean the starter battery, nothing really. It's a "smart" alternator and over time it will learn and adapt its chagring output to suit.

 

[FWhite]

If you mean the starter battery, nothing really. It's a "smart" alternator and over time it will learn and adapt its chagring output to suit.

This.
Additionally you may have some nuisances like Start&Stop not working (and no error codes thrown) until your ECU has decided that the new battery is of its liking.

 

[AdL]

Yes. Starter battery. OK great, not that bothered if start/stop does not work for a while. Only use the van on long trips and never in town so not much call for start/stop anyway.

 

[FWhite]

Yes. Starter battery. OK great, not that bothered if start/stop does not work for a while. Only use the van on long trips and never in town so not much call for start/stop anyway.

Of course you should try to get a battery similar to the one that you are going to replace, to better fool the system.. I.e. if you had already an AGM and you replace it with a regular Lead Acid your ECU may try to overcharge it for a while. That may shorten the life of your new battery, long term.
But batteries are strange animals. anyway, and nobody can say how long they last, really.

 

[AdL]

For sure...the same battery if I can. I guess what I have is the original that came with the van when new.