How to Program BMW X6 CAS3++ Remote Key with Lonsdor K518

Guide to add remote key to a BMW X6 CAS3++ immobilizer system by using Lonsdor K518 key programmer.

Procedure:
Step 1: Update CAS3++
Connect K518 host with vehicle via OBD socket
Select BMW->By System-> CAS2/CAS3-> Program key

Ready to generate dealer key:

1. The operation can add a key to vehicle (select unused key position)
2.  The operation can replace original key (select used key position)
3. Can generate key with K518 by OBD or slot

Press YES
Insert key that will start vehicle
Turn ignition ON
Lonsdor K518 will display CAS information
It shows the CAS type is not supported, follow guides to update CAS++ (ISTAP).

select CAS3 Update

Ready to update CAS3

1. The operation will update CAS++
2. Please backup original EEPROM data before operation

Insert key that will start vehicle
Turn ignition ON
Read CAS part number and type. Then read key information, tooth code, remote frequency, ignition key position etc

Read to update CAS. The procedure takes about 10 minutes

Do not carry on if battery voltage is lower than 11.5V
Make sure vehicle has enough power supply andn battery voltage is higher than 11.5V.
Don't disconnect battery nor insert key into ignition during the procedure.
If it is smart key, take away from vehicle

Remove key from ignition
Take smart key away from vehicle

Restarting CAS...

Erasing FLASH data

Downloading and verifying data until it completed

Step 2: Program Key
Select Program Key function on Lonsdor K518ISE menu

Insert a working key and turn on ignition
K518 read updated CAS information
Encrypted CAS, please backup EEPROM data before operation

Read key information again
Reading RAM, takes about 1 minute

Remove key from ignition
Take smart key away from vehicle
serurity check
reading key information
Select a unused key position (Key Position 3 or 4) and generate by OBD

Insert the key to be programmed into K518 host slot to identify if the key is brand new

Select key type: Remote Key

Insert the key to be programmed into ignition
Put smart key into card slot
Well connect Lonsdor K518 key programmer with vehicle
Writing key information

To program smart key or remote key, you need complete follow steps:

1. Remove key from ignition
2. Insert key
3. Press on Start button

If cannot start vehicle, or dashboard displays ELV icon , you may need to synchronize DME or ELV accordingly
Write key success

Test the new remote key.
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