Make sure you go to the settings page before you upload and select regular JB4 since there is alot of options out there now with the G5 and G5 ISO. It takes about 5 minutes I would say and when its done it will say upload complete. Find the new firmware you just downloaded and double click it and then click upload. click FILE and UPLOAD FIRMWARE, then click OK, and then it lets you browse to what you want to load. Then go into your car and with your foot off the brake, push the start button twice (a good way I use to check was to turn my headlights on and make sure they come on) Connect your laptop to your computer and connect to the JB4 interface. Download that to your computer and save it so you know where it is. scroll down to right under the big box that tells you what settings do what and you will see a small little hex file. download the hex file Terry puts on N54tech under JB4 firmware, software ect. Sorry for the low volume This is the process for cutting the diodes on a JB4 board to make it ISO ready. After flashing the ECU, do I need to set up something or does it automatically changes the timing How and what does Backend flash do to my car anyway I am on Map 5 at the moment. Before I had my G5 ISO I remember the 6/10 firmware and the 8/21 is better in my opinion. I just got JB4 G5 backend flash (MHD) I read about it from the bimmer post and other area that JB4 controls the boost and MHD controls the timing. Often imitated but never duplicated the JB4 has been the gold standard in plug and play turbocharged performance tuning for over a decade.I would def upload the newest firmware Terry has for the JB4. In addition the JB4 system is not VIN locked to your vehicle and can be quickly removed without a trace and swapped between cars or resold at a later time. BMS regularly publishes free mapping and firmware updates adding performance and features as ongoing development allows. While it's not the only tuning system that operates this way the JB4 separates itself from the competition with much more advanced connection points and processing including CANbus, fuel & spark control, bluetooth to your smartphone, and a variety of innovative and advanced features not possible with any other system. F40Model Year: 2019 + Previous Generations F20 / F21Model Year: 2012 - 2018. The JB4 tuner installs between your car's sensors and its DME/ECU (computer) and manipulates vehicle performance through these connections making your vehicle much faster. The JB4 is a plug and play tune available for turbocharged vehicles.
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