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October 13, 2023 Service bulletin

This bulletin provides instructions regarding unauthorized chip tuning (TD1).

Audi technical service bulletin A0123812028842_4 for 2009-2025 Audi A4, 2009-2025 Audi A6 and 2009-2025 Audi Q5 and others.

Bulletin number
A0123812028842_4
Component
Electrical system
Summary
This bulletin provides instructions regarding unauthorized chip tuning (TD1).

Owners of these vehicles have filed 1,379 complaints in the electrical category.

Vehicles covered

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