Service bulletins for the 2015 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.
507 on file from NHTSA, as of 2026-10-19.
By type
By component
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Only bulletins with component: Engine are shown. Show all
| A1920042025303_1 | 2020-07-07. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin contains instructions for identifying and mixing factory fill coolants. |
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| A0020372059437_1 | 2020-06-04. Service bulletin. ENGINE; FUEL SYSTEM, GASOLINE:DELIVERY. The informational bulletin explains why during COVID-19 there is winter-blend fuel during a warmer season and causing some issues. |
| Circular19N8REV1 | 2020-03-06. Service bulletin. ENGINE; FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP. SERV_ACT - After-Run Coolant Pump - Updated claiming and work instructions: A single part number per criteria will now be used. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.