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 B11AF 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: B11AF are shown. Show all
| A8723372055257_6 | 2023-02-07. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin provides directions when the customer describes a problem with the HVAC system DTCs B11AF07 and/or B109207 could be logged as sporadic or static. |
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| A8720032055257_5 | 2020-03-05. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This bulletin contains repair instructions for when the HVAC system is having issues with air flow and temperature commands with DTCs B11AF07 and B109207. |
| A8719022055257_4 | 2020-01-08. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:APPLIANCE:AIR CONDITIONER. This bulletin contains repair instructions for when the HVAC system is having issues with air flow and temperature commands with DTCs B11AF07 and B109207. 2017-2019 A4 allroad, 2018-2019 A5 Sportback |
| A8719012055257_3 | 2020-01-08. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; EQUIPMENT ADAPTIVE/MOBILITY. This bulletin contains repair instructions for when the HVAC system is having issues with air flow and temperature commands with DTCs B11AF07 and B109207. 2017-2019 A4 allroad, 2018-2019 A5 Sportback |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.