Service bulletins for the 2021 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.
1057 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Sunroof are shown. Show all
| A7024892044417_1 | 2024-04-04. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. This bulletin provides information when there are noises from the headliner/sunroof area. |
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| A6023682063187_4 | 2023-11-06. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. This bulletin provides information for when the outer perimeter seal is loose on the panoramic sunroof opening. |
| A9023242054505_4 | 2023-05-05. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. This bulletin provides instructions for when the sunroof glass panel, or the sunroof rollershade does not operate properly. |
| A6023612063187_2 | 2023-02-07. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. This bulletin provides instructions for when a customer reports concerns with the sunroof opening permeter seal is generating noise, dripping water, or if the seal is distorted and/or not flush with the roof panel. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.