HELP w/ BMS Flash!

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Hey guys,

So I have the BT cable for my 2009 135i but I'm looking for someone with experience having done this BMS back end flash. It seems to be a bit comprehensive and don't want to take any chances.

I will pay for your time if anything

Please let me know if you can lend a hand! I'm located in westchester county NY.

OR if any shops would be able to do it that you may suggest that would be great also.

Thank!