With the recent announcement that a method has been found to tune BMW F Series ECUs via OBD-II with no DME Unlock required, I thought it would be a great opportunity to made a video explaining all the various different approaches to increasing engine performance, from via Piggyback systems like JB4 to Custom Flash methods, and explain the details around what we know about this new flashing technique.

Think of this an all encompassing guide to everything you should know before you choose how you’d like to go about tuning your F Series BMW.


Details are scarce regarding this new flashing method, but what we know is it’s done via OBD-II, and it doesn’t require the ECU/DME to be removed front he car to be unlocked like previous methods required. We also know that this method does not bypass the flash counter, so you are limited to 60 flashes before the counter reaches 0, at which point the DME will need to be removed and bench-flashed to remove the limit.

While there’s already been a flood of tuning solutions hit the market using this new method, my guess is it will be a while before we see full tuning suites and end user products such as COBB Accessport and Bootmod3 developed for this new method, but this is BIG EXCITING NEWS for us all!

This article is relevant to a F-Series BMW Owners including M135i, M235i, M240i, 228i, 328i, 335i, 4 Series, 5 Series, 5 Series, including all M Models, M2, M3, M4, M5.