Service bulletins for the 2021 Audi A4
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
1057 on file from NHTSA, as of 2026-10-19.
About B13BC on the 2021 Audi A4: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
Only bulletins with trouble code: B13BC are shown. Show all
| A6924112056406_5 | 2024-07-02. Service bulletin. AIR BAGS. This bulletin provides information when the airbag warning light is on, DTC B13BCF2 stored in the airbag control module. |
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| A6924112056406_5 | 2024-07-02. Service bulletin. AIR BAGS. This bulletin provides information when the airbag warning light is on, DTC B13BCF2 stored in the airbag control module. |
| A6923912056406_4 | 2023-07-10. Service bulletin. AIR BAGS. This bulletin provides information for when the airbag warning light is on and DTC B13BCF2 is stored in the airbag control module. |
| A6922812056406_3 | 2022-03-04. Service bulletin. AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT. This bulletin contains instructions for when the airbag warning is illuminated and DTC B13BCF2 is stored. |
| A6921692056406_2 | 2021-10-05. Service bulletin. AIR BAGS. This bulletin contains instructions for when the airbag warning is illuminated and DTC B13BCF2 is stored. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.