Service bulletins for the 2019 Audi A4 allroad
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.
503 on file from NHTSA, as of 2026-10-19.
About U1421 on the 2019 Audi A4 allroad: 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: U1421 are shown. Show all
| TSB_2056076_22 | 2025-04-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there is an SOS Malfunction with ConBox Low, "Emergency call function: fault", (DTC U142100, U153E00). |
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| A9124522056076_21 | 2024-10-28. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there is an SOS Malfunction with ConBox Low, "Emergency call function: fault", (DTC U142100, U153E00). |
| A9124482070942_4 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there is an SOS Malfunction warning in the instrument cluster in vehicles with ConBox Low; DTC U142100 stored in the gateway. |
| A9124482070942_4 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there is an SOS Malfunction warning in the instrument cluster in vehicles with ConBox Low; DTC U142100 stored in the gateway. |
| A9124052070942_3 | 2024-05-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there is no diagnostic communication to the control module (ConBox), DTC U142100. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.