Launch X431 IMMO Plus Program BMW CAS3+ Key Adding

This is a tutorial on using Launch X431 IMMO Plus to program BMW CAS3+ key adding by OBD. The procedure also applies to X431 IMMO Elite.

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Procedure
1. Backup Key Info
IMMO >> BMW
Connect the diagnostic connector and X431 IMMO Plus Programmer at the same time.
Press “OK”.

Anti-theft key matching >> CAS3/CAS3+ IMMO >> Key operation >> Key data operation >> Backup key data
Use the function to backup CAS key data.
Remarks: it is suggested that the CAS original key data should be backed up with the function before key learning.
Press “OK”.
Reading key data… please wait!

Take the key out form the ignition switch!
If the key is a smart one, please put it outside the vehicle.
Please click “OK” directly if there is no key in the ignition switch.
Press “Backup” to save the file.
Key information backup successful!

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2. Add Key
Press “Key learning”.
The current CAS type is an encrypted version. Are all keys lost? No
Please insert a working key into the ignition switch and press the Start button!
Take the key out from the ignition switch!
If the key is a smart one, please put it outside the vehicle.
Please click “OK” directly if there is no key in the ignition switch.
Key data read successfully.
Whether to save key data? No

Select a free key location: Key 8 >> Key generated by the programmer
Please put the new key to be learned into the X-Prog3 Programmer!
Is the current key a smart one? No

The dealer key is generated successfully. Please try to start the vehicle.
If the newly generated key cannot start the vehicle, please execute DME synchronization or DLE synchronization function according to the situation.

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