Originally Posted by Madill21
I know the boards are different and ill def be looking into the upgrade when I have a little more cash flow. Christmas always hurts!
Is the JB4 more likely to throw codes...? I know it's more advanced and everything. The car is my daily driver and I don't track it. (Yet) I always run 93 octane. Was just planning on running JB3 map 3-4.
The JB3 is obsolete now and no longer compatible with newer software versions from BMW. So it may throw check engine lights, not run right, etc. I would throw it under the bed until you can afford the JB4 upgrade.