In this article, we are going to show you how to program BMW CAS4 via OBD. All keys are lost and we already get ISN number on bench. We will use Launch X431 IMMO Plus with X-PROG3.
And Launch Key Programmers only support generating keys by ignition switch.
Steps:
Connect IMMO PLUS to OBD port.
Select
IMMO>>BMW>>Anti-theft Key Making>>Automatic Detection
ECU information.
Select “Read out Preprocessing”, which usually takes 5-10 minutes and we better use a battery supplier.
Select “Key Learning”.
Select an unused key position and select “Key Generated By ignition switch”.
Put keys close to ignition switch as required.
Key is added.
If ISN number is not automatically written into new keys.
Select “Replace immobilizer data”.
Select new keys and select “modify”.
Enter ISN.
Done! That’s how to program BMW CAS4 keys via OBD using X431 IMMO Plus Tablet.
Credit to Sparky in London.
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