Xhorse VVDI Key Tool Plus Adds BMW 523i CAS4 1L15Y Key via OBD

Xhorse VVDI Key Tool Plus supports to add a new smart key for BMW 523i CAS4 1L15Y via OBD successfully. No need CAS disassembly, 5 minutes to be done.

1. Read Key Info

Prepare a working key & a new key, connect VVDI Key Tool Plus with OBD.

And turn ignition on, press

Immo programming >> BMW >> Automatically diagnose models >> Start programming

The current system type is detected as CAS4 1L15Y.

Please wait…

Generate keys via OBD >> Read key information >> Continue >> Continue

Note: prepare dealer key require unlock CAS4, enable key and disable key no need unlock CAS4!

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2. Unlock CAS4

Unlock CAS4/CAS4+ >> Yes >> Save here, Rename, OK

Updating flashing…(please don’t touch any button on the car!)

Wait processing until 100%.

CAS4/CAS4+ unlock success!

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3. Program New Key

Prepare dealer key with ignition switch >> Select a blank key position: Key 4 >> Record key info, OK

Insert the new key into ignition or keep the new key close to emergency start position of the vehicle.

Learning key, please wait…

Key learn success!

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Test the keys now, both can work well.


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This is how to use VVDI Key Tool Plus to program a BMW 523i CAS4 1L15Y key via OBD.

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