Immobilizer III Key Matching (Kessy)

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This procedure details how to match new keys to VW/Audi/Seat/Skoda vehicles with with Immobilizer III, where the immobilizer control module is integrated in a separate immo box. See the separate instructions for models where the immobilizer control module is integrated in instrument cluster or where the immobilizer control module is part of a separate Control Module).

Determining IMMO-ID & VIN

[05 - Acc/Start Auth.]
[Meas. Blocks - 08]
Select Block 081.
The first 17-digit string is the VIN. The second 14-digit string in the Immo-ID..
[Done, Go Back]
[Close Controller, Go Back - 06]

Key Matching


  • Battery voltage at least 12.0 V. We strongly recommend the use of a battery charger.
  • You can match up to 8 keys.
  • All keys are either new or were adapted to this car (IMMO-ID) before.
  • While adapting each key, make sure to place the other keys away from the ignition lock (reader coil). The passenger seat is an adequate place.
  • If all Keys are new OR the first inserted Key is new, the Ignition will NOT switch ON with this key.
    • Put the first Key into the ignition Lock, but do NOT switch ON the ignition.
    • Press and Hold the Brake Pedal for 20 Seconds to wake up the Diagnostic Databus.

[05 - Acc/Start Auth.]
[Meas. Blocks - 08]
Select Block 022.
The value in field 3 must be 1. If value is not 1, the key is not capable of being adapted to Immobilizer.
You can check each key in this manner.

Select Block 023.
Make sure the shown lock times in field 1, 2, 3 and 4 are 0 (each field represents a time in minutes).

  • If the lock times are NOT 0:
    • Do NOT switch off the ignition!
    • Allow the car to sit for AT LEAST the number of minutes that were indicated by the fields 1-4.

[Done, Go Back]

[Sec. Access - 16]

  • 4-digit PIN
    • Enter zero followed by the 4-digit PIN. For example, if your PIN is 1234, enter 01234.
  • 7-digit PIN

[Do it!]

[Adaptation - 10]
Enter 21 in "Channel Number".
The "Stored Value" is the number of keys currently matched.
Enter a "new value" corresponding to the total number of keys to be matched, including any existing keys.
The old keys are automatically being cleared.
[Done, Go Back]
[Close Controller, Go Back - 06]

  • Repeat the following steps until all Keys have been matched:
    • Switch Ignition OFF and remove Key, Steering Lock should engage.
    • Insert the next Key and switch Ignition ON.
    • The Immobilizer Warning Light will light up for ~2 seconds, wait until it goes out.

Note: The above steps after saving the adaptation, should not exceed 60 seconds withing matching 2 of the keys and having one key in the ignition should not exceed 30 seconds!