Service bulletins for the 2018 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.
772 on file from NHTSA, as of 2026-10-19.
About U0300 on the 2018 Audi A4: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: U0300 are shown. Show all
| A3923542048671_6 | 2023-06-06. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides a software update for when "All Wheel Drive Malfunction Message" is displayed in the instrument cluster and DTC U030000 is logged. |
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| A3921452048671_5 | 2021-12-07. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin contains instructions for when DTC U030000 appears and “All Wheel Drive Malfunction Message” is displayed in the instrument cluster. |
| A3920262048671_4 | 2020-04-02. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin contains instructions for when DTC U030000 appears and 'All Wheel Drive Malfunction Message' is displayed in the instrument cluster. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.