Here comes the user’s working experience on how repair BMW FEM/BDC module after programming failed with AUTEL IM508S.
“I worked on BMW X1 2017 BDC01. I pull FEM/BDC module out of car, connected it with godiag and started process as usual. After EEPROM successfully preprocessing, Autel started to program module to get SK but it wrote “Failed to program” and restored original EEPROM data back. After this, I put ECU back to car but it didnt start and ignition didnt wake up. So I tried to backup coding file but it didnt help. After little survey I tried to check software version (which I did also before I started programming) but Autel showed me “Software mismatch”. So I used ECU recovery process, choose original FEM/BDC data (backup done by reading ECU info) and it helped. So even I didnt program new key, I was able to repair ECU.”
For the future always read the EEPROM twice and compare it by seen first page and last page just simple tip if you keep using autel for BMW.
You can compare the two readings and see if they are exactly the same, Just to make sure that you get the same data.
