Perform a "Verify" pass. If the programmer reads back a different checksum, your EPROM is bad or the voltage is unstable.
Localized error messages and instructions for global users. upd09051.bin
Note: If you have custom coding (like a digital speedometer), users have reported that this specific update generally does Perform a "Verify" pass
To install the update, follow these steps as recommended by BMW of Escondido and BimmerTech : BMW CIC & Combox USB Firmware Updates - GitHub Gist hardware compatibility checks
Provide pre-update diagnostics (e.g., hardware compatibility checks, disk space verification).