I'll try to keep my long story short, my DME ( Bosch 0261204467 ) unit in my 1997_5 BMW 740i is kaput.

I sourced a used one from ebay. I'm aware of the DME and EWS alignment that is required and only possible from virgin state DME units.

However this is where some special knowledge would come in(reading forums online a select few have done this successfully). So, if i install my new(used) DME from ebay can I use my INPA program to read the ISN, so i can then input this ISN password into the EWS module?

I am going to be buying this EWS EDITOR however i wanted to make certain that i can first read the password.

I'll try to keep this clear as possible, right now, if i use INPA to read my OLD DME unit and go to my DME5.2 and view the coding data from there (F3) the line on the bottom that says ISN for EWS is populated with "3ac". If I do the same with my ebay DME is this the password that i need to put into my EWS with the EWS editor? Are there any other rolling codes that i need to get first?

The reason i ask is because when i select the EWS module in INPA and click on ISN PW(F4) it says ecu rejected (keeping in mind this is on the DME that already starts and runs that car) is this because that information is encrypted and not to be worried about?

Now, since some of you are the experts and know of a better or easier way of doing this may you let me know of that as well. I had held off on buying the EWS editor in hopes of having some input first.

Any constructive info is welcome and appreciated.

If anyone would rather private message me their response please feel free!

Thanks!