Procedure for post HV battery replacement?

[Howard_silver]

Greetings,

I need guidance on the necessary steps to take following the installation of a replacement high-voltage battery in my 2016 225xe.


The physical procedure seems to have proceeded successfully, as a pre-owned HV battery was acquired and a local EV specialist replaced the defective HV battery with the new one.

The vehicle operates effectively, exhibiting no errors (auditory alerts, warnings, or drivetrain error messages). Although the range appears to have improved, the range indicator on the EV battery screen continues to reflect the previous battery range of 10 miles (originally a 7kW battery), despite achieving greater distance with the newly installed 10kW battery.

Is a software upgrade or reset necessary to inform the vehicle about the new HV batteries, enabling accurate range display and proper charging?

Thank you very much.

[ianwh4]

Some reprogramming may be necessary, but I am uncertain how to proceed. Apologies.
The ECU was programmed at the manufacture with the battery specifications, hence it requires updated information regarding the current battery.

[Howard_silver]

Indeed, I suspected that would be the situation; but, I am uncertain how to proceed.

Ultimately, the crucial aspect is that the vehicle is operational, powered by electricity, without any warnings or faults; however, it would be preferable to perform the task thoroughly.


Thank you.

[Craigbelont]

I fully concur; securing the position is commendable.
Such matters occupy my thoughts as well.
I am not knowledgeable about electric vehicles; nevertheless, you might enquire with local EV specialists or your nearby BMW independent mechanic, who may possess coding expertise or know someone who does.

[Howard_silver]

Indeed, I will explore local options to identify any electric vehicle specialists capable of updating and reprogramming the ECU.

Currently, the ECU appears to recognise the prior 7Kw battery as installed, thereby treating the replacement battery as if it were the defective one. Additionally, it is unclear whether the ECU retains information regarding the fault of the old battery, which could influence its charging and usage protocols. Consequently, updating and recoding the ECU would reset these parameters, ensuring the proper utilisation of the replacement battery.


I remain hopeful!