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hathaway hathaway is offline
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Posts: 4
Join Date: Nov 2019
Car: 2010 X5M
Question 11-09-2019, 09:12 AM

Seek help

My car is the 2010 X5M s63b44a.

I just bought a BMS stage1 for the s63 harness a model with Bluetooth kit.


The Bluetooth kit is connected to one of the two red wires and can be connected to the mobile phone normally.

When upgrading firmware, I failed every time I reached 239 / 432. I've tried it hundreds of times.

At present, the device can be connected through a mobile phone, but it can't be used, so I have to remove it first.


I don't have a USB cable, only a mobile phone can connect with it. What's the solution?

Last edited by hathaway; 11-09-2019 at 09:17 AM..
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