How to Program EWS4 Key with AK90 or R270 Programmer
As titled, here obdii365.com introduces 2 methods to program BMW EWS4 (EWS4.3 & EWS4.4 transponder) using BMW EWS-4.3 & 4.4 IC adapter adapter without soldering.
Method 1:
Program EWS4 key with AK90+/AK91 & EWS4 adapter
Remove EWS4 immo box
Connect EWS4 board to EWS4 adapter and AK90 key programmer
Select MCU 2L86D and Read EWS
Read data success and save data
EWS Analyse
You should be at the main screen with all the numbers and letters on, place your virgin/new key into the slot on the AK90 and select write key
Select the slot and select write key you will get a warning making sure that you have placed key in slot just select yes
After aprox 1-2mins you should see confirmation that the keys data is coded
Put EWS4 unit back to car.
Method 2:
Read dump with R270 & Write key with key programmer
Again remove EWS4 immo box
Connect EWS4 board with EWS4 adapter and R270 BDM programmer
Open R270 in-circuit programmer software
Select correct MCU: 2L86D
Press Read
Software requests to check pin state
Press YES
Pin check and MCU correct
Press Yes and read begins
Save dump file (file containing rolling key codes)
Open your key programmer software, i.e AD-900 pro or other programmer can be loaded dump file
Select EEPROM and upload bin file read by R270
Software opens correct module 063 for BMW EWS4
Key slot 1 to 4 are listed
To avoid manufacturer conflict, select highest available slot 4
Insert blank 7935 transponder into AD900 and press Program button
Data is sent to the AD900
Transponder is produced to start vehicle
Then reinstall EWS4 immo box back to vehicle.