Service bulletins for the 2021 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.
969 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Labels and manuals are shown. Show all
| 21VEHCONDREP713 | 2020-08-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. New Document |
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| 21TIREPRSTBL06 | 2020-08-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS. New Document |
| 21TechRefGde630 | 2020-08-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. New Document |
| A5120132009967_1 | 2020-04-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for vehicle inspection, protection removal, and detailing. |
| A0019292031473_2 | 2020-01-08. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin contains instructions for when car wash bristles are stuck in the headlights. 2015-2021 A3 Cabriolet, 2015-2018 A3 e-tron, 2011-2021 A4 allroad, 2018-2021 A5 Sportback, 2011-2012 and 2018-2021 RS5 Cabriolet, 2018-2021 S5 Sportback, 2021 RS6 Avant |
| A9119762051720_3 | 2019-09-16. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for submitting a customer registration form for the Audi phone box to the customer's Mobile Network Operator. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.