How to Clone BMW MSD81.2 DME with Launch X431 IMMO Plus?

How to replace a BMW MSD81.2 engine ECU DME with a used one using Launch X431 IMMO Plus/IMMO Elite?

Here we will show how to make replacement ecu for bmw with msd 81.2. Read isn from old ecu (engine control module) and modify new ecu flash and write isn to make it work with car.

Same procedure goes to MSD80/MSD85/MSV80 etc.

 

Procedure:

Go to BMW function- Main Function- Engine Module Replacement- Bench Mode- MSD81_TC1796.

Check wiring diagram.

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Connect ECU with X-prog3 follow the diagram.

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Connect ECU.
It takes some time to access security login.

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Read chip ID.

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Then back up flash data of the original ECU.

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Save flash data.

Then hit “FLASH Data decryption” function to retrieve ISN code of original ECU. Record this 32-digit ISN code.

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Disconnect ECU.

Then connect the replacement ECU with Launch X431 IMMO Plus x-prog3 following the same diagram.

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Connect ECU, do security login.

Back up flash data of the donor ECU.

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Extract the ISN from flash data of donor ECU. This is the ISN for the replacement ECU.

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Go back and select “Change ISN” function.

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Input 32-digit ISN code that we read from original ECU.

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Modify ISN successfully.

Then save new flash data.

We can verify the ISN code by extracting ISN code from latest flash data.

It is the same as original ECU.

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Latest step is to write the flash data back to the donor ECU.

Select “Restore Flash Data” function.

Select latest flash data and write.

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Write flash data successfully.

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Disconnect ECU.

Now install the replacement ECU back to vehicle and test.

Done.

 

Read also:

How to Repair BMW FRM3 Module with Launch X431 IMMO Plus X-prog3

Yanhua Mini ACDP Clone BMW MSV90 DME on Bench

 

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