[modernist]

I just picked up a E91 LCI yesterday. Finally, my search is complete.

I found out that the installed replacement battery is incorrect.

I looked in the BMW manual, but could not find the proper spec for the battery.

I understand that I will need to register the new battery from past threads.

Is it true that each car's battery spec voltage may differ depending on which options? If so how do I find out the correct battery spec?

Much appreciated

[Mark963]

The battery is registered to these cars. It has options for flooded or AGM and several capacities from something like 80Ah to 110Ah, I think. Search for registering your BMW battery and you'll find lots of information. You should get a BMW reader or INPA/ISTA+ on a laptop with an appropriate cable to see what the car thinks is installed. As long as the battery matches what is registered, it's fine.

[modernist]

Thanks Mark963!