DME Custom Code Upgrade Service from CustomROM v1 to CustomROM V2 service provided by Femto in Finland. All BMW vehicles previously unlocked with BM3 CustomROM V1 before 3/18/25 for compatibility with bootmod3 REV2 DirectPWM and FlexRay Controller or for users changing tuning platforms (ex: MHD to bm3).
Unlocking Process Outline
- Purchase the Unlock procedure from this page. With purchase, you’re also purchasing your Return Shipping Label.
- For those planning on running Bootmod3, you must create an account and activate your vehicle prior to removing your DME
- Remove your DME from your vehicle
- Mail your DME to our facility for preparation
- Typical wait time is 5-7 days (sometimes sooner) in which your DME will be unlocked and returned to you
- Reinstall DME in your vehicle, remember to turn off OTA updates
- Flash with your preferred Flash Tune
In the meantime your DME will be shipped via DHL to Femto/Finland, where it will be unlocked and returned to our facility in Anaheim, CA. In most cases with standard shipping this is about ~5-7 business day turnaround, sometimes sooner in some cases. Additionally, as an added safeguard - we add Apple AirTag tracking devices to each DME shipment prior to shipping.
bootmod3 CustomROM V2 Unlock
Custom Code Upgrade for CustomROM V2 which includes map switching, flex fuel, antilag, in-dash ethanol content check on rpm gauge, Includes support for bootmod3 REV2 DirectPWM and FlexRay Controller. BM3 License & VIN must already be activated before sending us your DME. BM3 CustomROM will not be able to load if your license is not pre-activated and VIN of your car is not in the BM3 user database. OTA Updates must be disabled in iDrive to prevent accidental tune removal, in which an Unlock process will be required again.
MHD Unlock
Custom Code Upgrade for MHD’s latest custom code (map switch, anti lag, flex fuel, live tuning, Reflex integration, TCU limiter removal and much more) for all S58 vehicles. BM3 License & VIN must already be activated. Before sending in your DME please connect to your MHD app and press the "Unlock Check" button to verify your software version is supported for MHD+ features, otherwise contacting MHD support is required.
Vehicles Supported
BMW G87 M2
BMW G8X M3/M4, including Competition
BMW F97/F98 X3M/X4M, including Competition
BMW F95/F96 X5M/X6M, including Competition
