Add BMW CAS3 Key with Launch X431 IMMO Elite via EEPROM Success 
Require BMW IMMO software V10.18 and above.

Select BMW->Anti-theft key matching->CAS3/CAS3+ IMMO->MCU operation-> select mcu type, here select OM23S
Check connection diagram

Remove CAS3 module from car

Connect X-prog3, MCU V1 adapter with CAS3 module follow the wiring diagram

Read Chip IDThen Backup eeprom data

Read and backup FLASH data

Go back and select Key Operation->Key Learning->File Generate Key->0M23S

Select the eeprom data just saved

Select an unused key position and press Generate dealer key

If add key press Yes because we have a working key, if all keys lost you will need ISN code.

Select Yes to confirm there is a working key.

Put the working key to the x-prog3 programmer

Then put a new key to be programmed to the x-prog3 programmer

Generate dealer key successully.

Save new eeprom data.

Write new eeprom file to CAS. If CAS3 is ISTAP version, no need to write new eeprom back to CAS.

Go back to BMW->Anti-theft key matching->CAS3/CAS3+ IMMO->MCU operation-> 0M23S->Restore EEPROM data

Write new eeprom data back to CAS module.

Restore data successfully.

Now you can test the new key.

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I’ve got here a 2010 Toyota Sienna and I’m just going to walk you through the process on how to program a new key with LAUNCH X431 IMMO ELITE. Every car is different, some vehicles will need the immobilizer programming module while most won’t need that. Let’s go start.

Local diagnose >> Asian >> TOYOTA >> OK >> 16PIN DLC(North America) >> Laser Cruise >> w/ Memory Seat >> w/ VSC(Vehicle Stability Control) >> OK

If communication abnormally occurs during the test.

Please ensure whether the vehicle is equipped with other parts. If other parts are installed, you can try to remove the parts and then perform the test.

Service function >> OK

This function is used to detect all the Service Functions supported by this car.

Immobilizer/ Keys Programming >> Key Registration

Use this function to register a new Transponder Code.

This function registers a new Transponder Code by inserting a new key.

Please follow the prompt messages when you use this function.

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