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Today I'm gonna show how to clone BMW X3 Continental MSV90 ECU with Xhorse Multi-Prog Programmer by bench. Here I prepared an old ECU and a new one. Note: Please ensure the Multi-Prog Software version is 1.44 or above. Verify file integrity before writing. Open Multi-Prog software , Device >> BMW_CONTINENTAL_MSV90(BMW -> X3 Series) Follow the wiring diagram to connect Multi-Prog & ECU. Read the EEPROM data file. Read the FLASH data file. Open and then verify to ensure the file's integrity. Write info to the new ECU. All >> Immobilizer Write the serial number of the new ECU. Device >> BMW_CONTINENTAL_MSV90(BMW -> X3 Series) Select BENCH to write the info without removing the ECU. Click EEPROM to write the file. Click FLASH to write the file. Open >> Write Wait until the percentage until 100%... Starting the car. Connect the new ECU to the car. Start the car successfully. www.xhorse.co.uk