how to tell the difference between a G4 and a G5 JB4?

sebasupreme · 04-19-2016, 07:14 PM

looking to buy a used JB4 for a 2012 N55 E92 335i Harness B off the forums but how do I know if its a G4 or G5 board, idk what a G4 looks like and what a G5 looks like? If you have pictures could you please post, I already tried searching for the difference. I'm looking to get a G5 board.

OneMoreAlex · 04-19-2016, 07:36 PM

No such thing as N55 G5, that's only N54. The only difference would be Harness A or Harness B for N55. Some may have the ISO mod done to them which means they modified the board to run ISO firmware.

Manberg · 04-19-2016, 08:25 PM

Yeah I believe all the N55 JB4s were shipped as G5 boards. Only difference between G5 boards would be the cut diode and updated software to make it ISO. Terry from BMS said they will soon be shipping all new N55 JB4s as ISO.

sebasupreme · 04-19-2016, 08:43 PM

Quote:

Originally Posted by OneMoreAlex

No such thing as N55 G5, that's only N54. The only difference would be Harness A or Harness B for N55. Some may have the ISO mod done to them which means they modified the board to run ISO firmware.

Quote:

Originally Posted by Manberg

Yeah I believe all the N55 JB4s were shipped as G5 boards. Only difference between G5 boards would be the cut diode and updated software to make it ISO. Terry from BMS said they will soon be shipping all new N55 JB4s as ISO.

what exactly is ISO and what does it stand for? I'm looking to buy a JB4 from someone on the forums and he doesn't know, if it doesn't could I upgrade it or send it in to get the ISO update? What is the ISO supposed to do and is it preferred that I have it? What happens if I don't have the ISO update?

Manberg · 04-19-2016, 10:49 PM

N55 JB4 info
http://www.n54tech.com/forums/showthread.php?t=13189

N55 ISO
http://www.n54tech.com/forums/showthread.php?t=17800

The Boards there are very good for JB4 Support.

04-19-2016, 07:14 PM	#1
sebasupreme Second Lieutenant 41 Rep 263 Posts Drives: 2012 N55 E92 335i M Sport 6MT Join Date: Feb 2015 Location: Essex County, New Jersey iTrader: (1)	how to tell the difference between a G4 and a G5 JB4? looking to buy a used JB4 for a 2012 N55 E92 335i Harness B off the forums but how do I know if its a G4 or G5 board, idk what a G4 looks like and what a G5 looks like? If you have pictures could you please post, I already tried searching for the difference. I'm looking to get a G5 board.
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04-19-2016, 07:36 PM	#2
OneMoreAlex Second Lieutenant 45 Rep 194 Posts Drives: 2012 e92 335i Join Date: Aug 2015 Location: Long Island, NY iTrader: (0)	No such thing as N55 G5, that's only N54. The only difference would be Harness A or Harness B for N55. Some may have the ISO mod done to them which means they modified the board to run ISO firmware. __________________ 12' 335i \| CP-E CP \| MHD \| VRSF DP \| ALPINA B3 \|
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04-19-2016, 08:25 PM	#3
Manberg Second Lieutenant 88 Rep 239 Posts Drives: 2011 e90 335i Join Date: Aug 2013 Location: SoCal iTrader: (0)	Yeah I believe all the N55 JB4s were shipped as G5 boards. Only difference between G5 boards would be the cut diode and updated software to make it ISO. Terry from BMS said they will soon be shipping all new N55 JB4s as ISO. __________________ M-Sport, 6MT, PPK, JB4 ISO + Rev.3, VRSF 7'' FMIC, VRSF Catless DP, BMS Charge Pipe, MFactory LSD, Öhlins R&T, M3 Control Arms, Rogue 6MT Bushings, Remus Exhaust, Duke Dynamics CF Diffuser, Cyba Scoops, VMR VB3 19s, BMS Clucth Stop
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04-19-2016, 10:49 PM	#5
Manberg Second Lieutenant 88 Rep 239 Posts Drives: 2011 e90 335i Join Date: Aug 2013 Location: SoCal iTrader: (0)	N55 JB4 info http://www.n54tech.com/forums/showthread.php?t=13189 N55 ISO http://www.n54tech.com/forums/showthread.php?t=17800 The Boards there are very good for JB4 Support. __________________ M-Sport, 6MT, PPK, JB4 ISO + Rev.3, VRSF 7'' FMIC, VRSF Catless DP, BMS Charge Pipe, MFactory LSD, Öhlins R&T, M3 Control Arms, Rogue 6MT Bushings, Remus Exhaust, Duke Dynamics CF Diffuser, Cyba Scoops, VMR VB3 19s, BMS Clucth Stop
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