Registering a new battery resets the algorithm back to optimal charging voltage for the specified battery. Q: Why do I need to register a new battery?Ī: The short answer is that BMW designed the charging system with an algorithm that varies the rate of charge by the age and type of the battery installed. Over time, improper charging may have detrimental effects on the lifespan of your cars battery and the operation of the vehicles electronics. Q: I replaced my battery and it works just fine, why all the fuss?Ī: Disregarding the need to register and code for a new battery may result in improper charging.

Registration and coding will not be successful on older vehicles that are equipped with basic power management systems.

Read me firstly: if you have an older E90, this doesn’t apply to you, this guide only applies to vehicles equipped with IBS (intelligent battery sensor). Topic: Reading if you’d like to know why it’s important to register and code a new BMW battery, and how you can get it done yourself!

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