Jb4 update and ISO
So I asked Terry yesterday if I need to update my jb4 in order to install my e85 harness... He suggested firmware update or ISO. But I am guessing he said both? Can you guys help me out here? I have the link for the ISO, just need some clarification.
2011 e90 KW V1, JB4, BMS Dp, BMS Intake, CP, Alpina Flash, ISO, E85
Coming soon to the garage: 2014 M3 Maybe M5