Neither VW or Audi makes part numbers available as part of the service information (except for occasional references in Technical Bulletins).
If you have parts related questions or need technical repair assistance, please consider posting your query on the Technical Discussions Forum at http://www.bentleypublishers.com/tech.
Use of the Forum is free; you only need to sign up. The Forum is frequented by other VW and Audi enthusiasts, Professional VW and Audi Technicians, and our Technical Editors, all whom may have experienced the same issue you have and can assist with your content inquiries.
It is possible that some non-emissions related information is not made available by Volkswagen of America (i.e. Airbag Codes) and is found only on VAS 505x.
For more information, please see Independent Workshop Procedure for Obtaining Immobilizer Adaptation for Module Initialization: http://ebahn.bentleypublishers.com/VW/1/1F/vw-immobilizer-program.html
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