[sdshah]

Hey all,

I need some help - I purchased a JB4 Stage 2 with harness A from a forum member hoping to use it on my 2011 535XI M sport. I am getting conflicted info if it is just plug and play or do I have to update firmware etc.

Any help would be great.

Thanks

[Ben2k9]

Why would you do that without knowing for sure it was compatible? Seems like a bad gamble. I would just contact BMS for help.

[sdshah]

Lol horrible gamble. The seller and I both read somewhere it was good but then found different info. BMS and their tech support Jon have been horrible throughout the process - even though I'm a repeat customer from BMS directly. Thanks for the help. This is not compatible for anyone's future reference. Better to buy directly for your car.

Thanks.

[iamkit]

That's weird, i actually had my n55 tune on a 135 before installing it on my f10 535. I was gonna say, it worked for me so it should work for you

[sdshah]

Originally Posted by iamkit

That's weird, i actually had my n55 tune on a 135 before installing it on my f10 535. I was gonna say, it worked for me so it should work for you

Apparently I can buy posi tabs to connect to the CAN wires and load the f series firmware so it can be functional.

Is this what you did?

[r33_RGSport]

Originally Posted by sdshah

Apparently I can buy posi tabs to connect to the CAN wires and load the f series firmware so it can be functional.

Is this what you did?

Hi, just happened to stumble on your thread and I am a BMS reseller.
The N55 JB4 Stage 2 has different firmware between the E-series and F-series. But the hardware is the same.
So, in your case, you can hook everything up and update the firmware prior starting up the engine.
FYI, I don't recommend to buy a used electronics components as it is hard to detect any damage to it.

Let me know if you need other help.

[Cquilichini]

firmwares are different, contact bms before installing and get the BMS USB cable for firmware upgrade before even installing. good luck!