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September 1, 2021 Service bulletin

This informational bulletin gives instructions for identifying chip tuning.

Audi technical service bulletin A0121102028842_3 for 2009-2023 Audi A4, 2009-2023 Audi A6 and 2010-2021 Audi Q5 and others.

Bulletin number
A0121102028842_3
Component
Equipment: electrical
Summary
This informational bulletin gives instructions for identifying chip tuning.

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