No question is too small. We’re here to help.

General Questions

Yes, bFlash application can be installed on multiple devices, you just need to go through the OTP procedure on every device.

No, bFlash requires an active internet connection. Only bLog can be used offline if the definition was first downloaded with an active internet connection.

You can find the serial number on the back of your bFlash device. It is also displayed at the bottom left of the bFlash window when the device is connected. The SN is an 8-digit code.

Subscription & Ownership

No, bFlash requires an active subscription in order to work. Subscriptions can be renewed automatically or manually via purchasing it at https://bflash.eu/store/subscriptions

We offer 1, 3, 6, and 12-month subscriptions. It is necessary to add a subscription period to the base Master & Slave tool.

Yes, legal owners can sell their bFlash device. The new owner needs to buy bTransfer to transfer the ownership of the device.

You can sell your device following this procedure:

  • Step 1: The legal owner of the slave/master device needs to send an email to [email protected] confirming acknowledgment and allowing the sale (slave). Keep in mind that the email must come from the email account registered with that device

  • Step 2: The new owner needs to have/create a bFlash account

  • Step 3: The new owner needs to buy bTransfer from the new account

In order to speed up the process, please include [email protected] in the communication.

Technical Support

Our support is open Tuesday to Saturday, 09:00 to 18:00 (CET). During working hours, our support handles your request within 15 minutes.

  • bFlash master file (.bdc) - contains all ECU/TCU memory elements in a single file, the content is not encrypted

  • bFlash slave file (.sbdc) - same as .bdc but the content is encrypted, only the slave is able to program this file

  • bFlash bLog file (.mdf) - this log file format is standard and can be opened in any compatible third-party software

  • bFlash bSpy file (.candata) - binary file which contains all CAN messages recorded during the bSpy session

No, you can't. Each flash tool uses its own layout, some sectors may be missing, encrypted or not ordered identically as bFlash. Please note that bFlash always saves files that are not encrypted, you have full access to the content.

  • Always check the bFlash HELP section relating to a protocol, helpful information can be found there

  • Always plug a battery charger before OBD reading/writing

  • Check that your internet connection is stable, as it is mandatory during the whole process

  • Always reading the ECU before writing a file: without backup, it can be impossible to restore the ECU to its previous state

This bFlash feature allows the ABS/ESP to be deactivated in a given vehicle, preventing any intervention on the dyno. If your dyno does not support 4WD, you must unplug the transmission (Haldex...) as usual to switch to 2WD mode. On most vehicles the dyno mode switches to 2WD, but we do not recommend this procedure because it's not the main feature but a consequence !

Keep in mind to deactivate dyno mode before reading / writing any control unit in the vehicle. Caution! Never drive the vehicle on the road with dyno mode enabled for your safety and that of others.

Yes, all bFlash protocols correct checksums except for EEPROM.

bFlash always reads the maximum possible data and the file is not encrypted.

Follow the process described here and activate your bFlash device in 4 easy steps.

ECU Unlock Service

The chiptuning industry presents many challenges with the latest security complexity on certain control units. With that in mind, we have ECU Unlock procedure in place in order to protect the backdoor from being exposed to OEM.

All of our unlocks are done in 1 business day, your parcel is sent back at the time you arrange a pick-up service from our office in Willebroek, Belgium.

Generally, such update will not remove the unlock. However, if this happens, the new unlock will be free.

  • Add return label. We accept UPS and DHL delivery.

  • Include a document, which has an info sheet about the car.

  • You can download the template at bflash.eu/mercedes-unlock

  • Mention invoice reference for bFlash Unlock order(s).

  • All shipping costs must be covered by the sender.

  • Your parcel will be shipped back within 1-2 business days.

  • UPS delivery: We have a pick-up schedule from Tuesday to Friday before 16:30 CET. If we receive your parcel during this time window, we will send it back the same or the next business day.

  • Your parcel will be shipped within 1-2 business days.

  • All shipping costs must be covered by the sender.

  • DHL delivery: Customers will need to arrange DHL pickups themselves


Please fix the following errors.

Technical support

Thank you for contacting bFlash team. We will respond to your request within 1 business day.

Learn how we handle private data by reading our Privacy Policy.

Stay informed!

Subscribe to our newsletter.