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: Tires are shown. Show all
| A4423022065160_2 | 2023-09-01. Service bulletin. EQUIPMENT; TIRES:TEMPORARY/EMERGENCY SPARE TIRE. This bulletin provides information for when the collapsible wheel does not fully inflate using the toolkit. |
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| A9022672059863_3 | 2022-07-01. Service bulletin. TIRES; WHEELS. This bulletin advises to ensure that the correct wheels and tires are installed in instances where the Audi pre sense restricted message appears in the absence of DTCs. |
| A9022642059863_2 | 2022-06-07. Service bulletin. WHEELS; TIRES. This bulletin advises to ensure that the correct wheels and tires are installed in instances where the Audi pre sense restricted message appears in the absence of DTCs. |
| A4421842065160_1 | 2021-12-07. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; TIRES:TEMPORARY/EMERGENCY SPARE TIRE. This informational bulletin explains how the temporary/collapsible spare wheel inflates. |
| 21TechRefGde526 | 2021-06-03. Service bulletin. BACK OVER PREVENTION; TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). All models except Q3, R8, and TT: Settings Section: Split Verify and set language & measurements checklist items into 2 separate with instructions. Changed instructions for "Set Entertainment Fad in Parking aid", " Set Music volune while parking to Medium", and "Turn off Manual Seed Warning". Media/Radio/Sat Section: Changed instructions for "Verify HD Radio is turned "off". On-Hoist Inspection Section: Changed where to store tire pressures for Set and store tirepressures" to "Home > Vehicle > Settings & Service > Tire pressure monitoring". Audi connect Section: Changed instructions for "Turn on the Wi-Fi hotspot", Check Wi-Fi hotspot visibility", and Enable satellite map view for navigation" |
| 21TIREPRSTBL930 | 2020-10-06. Service bulletin. TIRES. Addition of RS 6 Avant |
| 21TIREPRSTBL924 | 2020-10-06. Service bulletin. TIRES. Addition of A4, S4, A4 allroad, A5, S5, RS 5, A6 allroad, S6, A8 L, A8 L TFSI e, S8 L, e-tron, Q8, SQ8, RS Q8 |
| 21AUTIRECHAINS | 2020-10-06. Service bulletin. TIRES; EQUIPMENT; WHEELS. Added new graphic to reflect where to find MY 21 information |
| 21TIREPRSTBL06 | 2020-08-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS. New Document |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.