Service bulletins for the 2020 Audi S4
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.
942 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
Only bulletins with component: Engine are shown. Show all
| 2010-2021EngOil | 2020-09-03. Service bulletin. ENGINE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. New document |
|---|---|
| A1920042025303_1 | 2020-07-07. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin contains instructions for identifying and mixing factory fill coolants. |
| A0120652058767_5 | 2020-07-07. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. This bulletin contains instructions for DTCs P218100, P017B00, P308100, and P01E400. |
| 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. |
| A0120572058767_3 | 2020-05-07. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. This bulletin contains instructions for DTCs P218100, P017B00, P308100, and P01E400. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.