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Service bulletins for the 2020 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.

1073 on file from NHTSA, as of 2026-10-19.

About B18BD on the 2020 Audi A4: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: B18BD are shown. Show all

Bulletins, newest first
A9124412060197_52024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there is an SOS emergency call malfunction; DTC B18BD11 or B18BD13 stored in the telematics control module
A9124412060197_52024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there is an SOS emergency call malfunction; DTC B18BD11 or B18BD13 stored in the telematics control module
A9123182060197_42023-09-01. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This bulletin provides information for when there is an SOS emergency call malfunction; DTC B19BD11 or B18BD13 is stored in the telematics control module.
A9123882060197_32023-05-05. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information in instances when the message "Emergency call function: malfunction! Function restricted. Please contact service" is displayed in the instrument cluster. DTCs B18BD11 or B18BD13 may be stored in the telematics control module.
A9123782060197_22023-04-06. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides information for when the message "Emergency call function: malfunction! Function restricted. Please contact service" is displayed in the instrument cluster; one of the following DTCs may be stored in the telematics control module: B18BD11, or B18BD13.
A9120872060197_12020-08-06. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin contains instructions for DTC B18BD11 or B18BD13 with a message in the instrument cluster.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.