It's not difficult to do airbag resetting with OBDSTAR P50 via OBD or Bench. Generally speaking, just strictly follow the quick guide in this post and you can reset airbag successfully.
General operation steps (for all ECU Part Number):
Make sure the correct part number is selected
Check whether there is an airbag collision
Only a few models can erase crash by fault code clearing
This function is only for a few Ford Renault car models. It may clear the VIN information during erasing crashing.
Confirm that the airbag crash fault has been successfully cleared
For more details, read How to Reset Airbag by OBDSTAR P50 on Bench?