Key and WFS Coding: A Practical Guide

Can anyone tell me how to code a key for a T4 Caravelle? I can't find a menu option in the VAG-Com menu, and it's asking for a login code. Where can I get this code?

Hello.

http://www.ross-tech.com/vag-com/cars/key-matching.html

http://www.ross-tech.com/vag-com/cars/key-matching-4digit.html

In the 'old' system, the 4-digit PIN was on a plastic tag attached to the key. In current vehicles, a 7-digit PIN is used, which can only be retrieved by a VAG partner at the factory.
Or, you can acquire a tool to extract the PIN from the immobilizer system (which is expensive).

Best regards, Rainer.

Rainer K. wrote:

With the 'old' system, the 4-digit PIN was on a small plastic tag attached to the key.

The transition occurred around 1998 (depending on the model), and since then, it seems there have been no more WFS logins through this method.

Rainer K. wrote:

For current vehicles, a 7-digit PIN is used, which can only be queried by the VAG partner at the factory.

According to relevant EU regulations, access to a WFS login should be available, for example, to independent workshops. While VW has partially implemented this, the process is naturally very obscure, but it is possible. Therefore, VW/Audi are not the only ones who can access this data for current models.

Four-digit and seven-digit login codes are essentially the same; the seven-digit code is intended to reduce the sharing of WFS login credentials, but it cannot completely prevent it. The control unit always only knows the four-digit login code, because the diagnostic device converts the seven-digit code into the corresponding four-digit code using the date, WSC, and vehicle identification number. To put it another way, I can use a seven-digit login code even with an older vehicle, just as I can use a four-digit login code with a newer vehicle.

VAG service centers (or those that use their diagnostic equipment with corresponding online access) no longer "see" the WFS login in this way, as their software has been modified to "hide" the login from the user.

Rainer K. wrote:

Alternatively, you can obtain a tool to read the PIN from the immobilizer (expensive).

...which only works with a limited number of vehicles...

Alternatively, it's possible to access the login through a speedometer calibrator. Fortunately, speedometer adjustments are no longer permitted in Germany, but professionals in the industry typically have enough experience to also extract the WFS logins from the engine control units.

Let's exclude the Audi A6 (4F) and Audi A8 (4E) from this discussion, as they have a component protection system that functions somewhat differently.

Hi,

Quote:

According to the relevant EU regulation, a WFS login should, for example, be accessible to independent workshops.

Is this new? It would finally be something positive amidst all the EU stuff... or has it been like this for a while, and they're just refusing to do anything about it?

Best regards, Rainer.

Rainer K. wrote:

Is this new? It would finally be something positive amidst all the EU stuff... or has it been like this for a longer time, and they are simply refusing to do it?

The regulation has been in place since the introduction of the GDPR guidelines, but nobody actually follows it.

Thank you!
This is already helpful to me.

Kiessig.

Rainer K. wrote:

Hello. http://www.ross-tech.com/vag-com/cars/key-matching.html http://www.ross-tech.com/vag-com/cars/key-matching-4digit.html In the 'old' system, the 4-digit PIN was on a plastic tag attached to the key. In current vehicles, a 7-digit PIN is used, which can only be retrieved by a VAG partner at the factory. Or, you can acquire a tool to extract the PIN from the immobilizer system (which is expensive). Greetings, Rainer

The four-digit PIN (without date restriction) and the seven-digit PIN (including the date) are equivalent.
There are even tools that can calculate a 4 out of a 7.

Haegar wrote:

The four-digit PIN (without date restriction) and the seven-digit PIN, including the date, are equivalent. There are even tools that can calculate a 4 from a 7.

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