Problem: All smart keys of BMW CAS2 are lost, new smart key can't start car and can't do remote functions. Solution: Program new remote key with Autel IM508+ XP400 Pro. Steps: Connect XP400 Pro to MaxiIM IM508, then connect IM508 to vehicle's OBDII port Insert new remote, turn hazard lights to prevent car from going into sleep mode. Tap IMMO>> BMW>> Auto Select>> Press Read button to get VIN Check vehicle information It's a 730LI E66 M54 2003 CAS2. View Vehicle Info>> Control Unit>> CAS2 Immobilizer>> Vehicle Info Frequency: 315Mhz Key Code: HA00028050 Back to IMMO Status Scan SCAN IMMO STATUS... Qty CAS Keys: 3 Check the information: Qty Keys: 3 Frequency: 315Mhz. Select All Keys Lost (Guided) Make sure the device is successfully connected to the Internet WiFi Turn on ignition Can't turn on because there is no valid key Select SEMI>> SMART Press Start to go through the All Keys Lost (Guided) process Connect Autel XP400 Pro and insert the new key into the coil hole Press OK Generate Key After the new key is successfully generated, insert the key into the vehicle slot and start the engine once. The key can start the engine now Press Yes to confirm the key can start the engine Re-immune status scan Key quantity is now 4. Finally, test the new remote. It works fine. Finished! All right! This is a successful case of using Autel MaxiIM IM508 with XP400 Pro to add a new smart remote to a 2003 BMW 730Li E66 CAS2. UK Professional OBD2 Tools Online Shop