Opel VIN Decoder - ECU EEPROM IMMO Key and Mileage Service v1.0

robbe said:

FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 28 FF FF 26 FF FF FF FF FF FF FF FF FF FF FF F...

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Based on the dump file you provided, I can confirm the Security Code location and value.

The PIN code is stored in the encrypted block at offset 0x084.
In your file, the bytes are: 7C 77 7D 74.

• PIN Code: 5878

Your calculation is correct. You can now use this code to reset (virginize) the used UEC using Op-Com or Tech2, and then program it to your car using your original car's PIN.

Technical Detail:
For future reference, the security code in the UEC 95040 EEPROM is located here:


Good job reading the EEPROM!

not shure what you mean with code block.

FF FF FF FF FF FF FF FF FF FF FF FF FF FF FFFF
FF FF 28 FF FF 26 FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF 26 26 FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FFFF
FF FF FF FF FF FF FF FF FF FF FF FD 07 FF FFFF
57 30 4C 30 41 48 4C 34 38 37 35 30 33 35 38 31
35 19 20 35 30 48 4D 42 30 20 20 20 13 FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF 7F 04 00 00 7C 77 7D 74 6B 2C 77 7D 74
6B 2C FF FF FF FF FF FF FF FF FF FF FF FF FF FF

robbe said:

not shure what you mean with code block.

FF FF FF FF FF FF FF FF FF FF FF FF FF FF FFFF
FF FF 28...

Click to expand...

Yes, the data you posted is exactly what was needed.

I have verified the file again, and your calculation is 100% correct.

PIN Code: 5878

Here is the technical verification based on the encryption mask for the Astra H UEC:


You can proceed to reset the unit with this code. Good luck!

robbe said:

Thanks so mutch

Click to expand...

You are welcome.

Just to be clear, the correct Security Code to use is 5878.

Good luck with the programming!