Audi A6 2019–2023 — technical service bulletin
Bulletin TSB_2058831_17 · NHTSA communication 11021440 · issued Jul 30, 2025
Technical service bulletin
communication type
Electrical System
component
2019–2023
model years
29
vehicle entries
Official summary
This TSB provides info when there is a 48V vehicle electrical system warning, DTC U046900 stored in the ECM.
Vehicles covered
- 2019 Audi A6
- 2020 Audi A6
- 2021 Audi A6
- 2022 Audi A6
- 2023 Audi A6
- 2020 Audi A6 Allroad
- 2021 Audi A6 Allroad
- 2022 Audi A6 Allroad
- 2023 Audi A6 Allroad
- 2019 Audi A7
- 2020 Audi A7
- 2021 Audi A7
- 2022 Audi A7
- 2023 Audi A7
- 2019 Audi A8
- 2020 Audi A8
- 2021 Audi A8
- 2022 Audi A8
- 2021 Audi A8 L E
- 2019 Audi Q7
- 2020 Audi Q7
- 2021 Audi Q7
- 2022 Audi Q7
- 2023 Audi Q7
- 2019 Audi Q8
- 2020 Audi Q8
- 2021 Audi Q8
- 2022 Audi Q8
- 2023 Audi Q8
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.