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This procedure details how to match new keys to Immobilizer-equipped VW/Audi vehicles. As of 11 Mar. 2002, VW and Audi are providing 7-digit Secret Key Codes in place of the earlier 4-digit SKC's. Keys must be coded using the new 7-digit SKC (secret key code) method unless the owner still has the correct 4-digit code.

Procedure for matching keys to vehicles with Immobilizer in the Instrument Cluster:
(includes many 1999+ Golf/GTI/Jetta/New Beetle/Passat, also Audi)

1.	[Select] [17 - Instruments] Write down the 14 digit Immobilizer ID number from the "Extra" field
2.	Take that ID number to your dealer and request your seven-digit SKC, along with the workshop code and importer number (all this information can be found in the upper-right corner of the Administration screen of the dealer's VAS 5051). Additional information about how to find the WSC and Importer Number can be found here.
3.	Measure the car's battery voltage, it must be 12.5 V or higher.
4.	[Select] [17 - Instruments] [Login - 11] [Use 7-digit PIN/SKC] Enter the 7-digit PIN, Date on which the PIN was generated by the dealer, along with the Workshop Code (WSC) and the Importer number of the dealer that generated the code. [OK]
5.	VAG-COM will validate the data you have entered and return you to the Login screen, where the Login Code will show as "XXXXX". [Do It!]
6.	[Adaptation - 10] Enter 21 in "Channel Number" [Read] The "Stored Value" is the number of keys currently matched. Enter "new value" of 0 [Save] This clears out the old key-matchings. Enter a "new value" corresponding to the total number of keys to be matched, including any existing keys [Save]
7.	[Done, Go Back] [Close Controller, Go Back - 06] Switch ignition off and remove key
8.	Insert next key to ignition and switch ignition on again The warning light for the Immobilizer will light up for ~2 seconds, then go out Switch ignition off and remove key
9.	Repeat step 8 with each key until all keys have been matched.

Procedure for adding keys to vehicles with separate Immobilizer:
(Includes 2000+ EuroVan, Cabrio, and many older non-US models)

1.	[Select] [25 - Immobilizer] Write down the 14 digit Immobilizer ID number from the "Extra" field
2.	Take that ID number to your dealer and request your seven-digit SKC, along with the workshop code and importer number (all this information can be found in the upper-right corner of the Administration screen of the dealer's VAS 5051). Additional information about how to find the WSC and Importer Number can be found here.
3.	Measure the car's battery voltage, it must be 12.5 V or higher.
4.	[Select] [25 - Immobilizer] [Login - 11] [Use 7-digit PIN/SKC] Enter the 7-digit PIN, the date on which the PIN was generated by the dealer, along with the Workshop Code (WSC) and the Importer Number of the dealer that generated the code. [OK]
5.	VAG-COM will validate the data you have entered and return you to the Login screen, where the Login Code will show as "XXXXX". [Do It!]
6.	[Adaptation - 10] Enter 01 in "Channel Number" [Read] The "Stored Value" is the number of keys currently matched. Enter "new value" of 0 [Save] This clears out the old key-matchings. Enter a "new value" corresponding to the total number of keys to be matched, including any existing keys [Save]
7.	[Done, Go Back] [Close Controller, Go Back - 06] Switch ignition off and remove key
8.	Insert next key to ignition and switch ignition on again Count to two ("One one-thousand, two one-thousand") out loud Switch ignition off and remove key
9.	Repeat step 8 with each key until all keys have been matched.