How to Clone BMW MSD81 DME with OBDSTAR DC706?

 In this article, we’ll walk through the process of performing a one-to-one clone of a BMW Z4’s MSD81 DME (Digital Motor Electronics) using the OBDSTAR DC706 tool with the P004 adapter. This procedure is straightforward and efficient, making it an excellent solution for replacing or duplicating the engine control unit (ECU) without requiring additional key programming or vehicle adaptation.

Tools and Equipment Needed

• OBDSTAR DC706: The primary diagnostic tool used for reading and writing ECU data.

• P004 Adapter: Required for connecting the OBDSTAR DC706 to the MSD81 DME.

• Original DME: The ECU from the BMW Z4 that needs to be cloned.

• Replacement DME: The new or donor ECU that will receive the cloned data.

Step-by-Step Process

1. Reading the Original DME Data

• Connect the OBDSTAR DC706 to the original MSD81 DME using the P004 adapter.

• Navigate to the ECM Flasher section in the OBDSTAR software and search for the MSD81 model.

• Follow the on-screen instructions to read the data from the original DME. The tool will extract three files: two EEPROM files (internal and external) and one flash file.

• Save the ISN (Individual Serial Number) code as a backup. This is crucial for any future programming or key additions.

1. Writing Data to the Replacement DME

   • Connect the replacement DME to the OBDSTAR DC706 using the same P004 adapter.

   • Select the Write option in the software and choose the files extracted from the original DME.

   • Begin by writing the internal EEPROM file. The tool will verify the data and confirm if any sectors need to be written.

   • Next, write the internal flash file. This process involves writing data to 13 different addresses within the flash memory. While most sectors may remain unchanged, some will require new data to be written.

   • Finally, write the external EEPROM file. This step completes the cloning process.

2. Verification and Completion

• Once all files have been successfully written, disconnect the OBDSTAR DC706 and power off the ignition.

• Remove the replacement DME from the adapter and install it into the vehicle.

• The cloned DME should now function identically to the original, allowing the vehicle to start without any additional programming or key learning.

Key Advantages of Using the OBDSTAR DC706

• Speed and Efficiency: The entire cloning process takes approximately 10 minutes, making it a quick solution for ECU replacement.

• No Additional Programming Required: Since this is a one-to-one clone, the vehicle will recognize the replacement DME immediately, eliminating the need for key programming or adaptation.

• User-Friendly Interface: The OBDSTAR DC706 provides clear instructions and visual aids, ensuring even less experienced users can complete the process successfully.

Important Notes

• Ensure the P004 adapter is properly connected to avoid damaging the DME pins.

• Always back up the ISN code before proceeding with the cloning process.

• Verify the data after writing to ensure the clone was successful.

Conclusion

Cloning a BMW Z4 MSD81 DME using the OBDSTAR DC706 is a reliable and efficient method for replacing or duplicating the engine control unit. With its user-friendly interface and fast processing, the OBDSTAR DC706 is an excellent tool for automotive professionals and enthusiasts alike.