Audi A4 B9 Sedan Carbon Fiber Exterior Parts (2017–2024)
The Audi A4 B9 Sedan (2017–2024), covering A4 and S4 trims, shares its mirror housing design with its B9-platform siblings, the A5/S5/RS5 Sportback and Coupe. AeroBon offers real carbon fiber trunk spoilers cut specifically for the A4/S4 sedan's trunk lid, along with mirror covers that carry over across the shared B9 mirror housing, including a variant for vehicles equipped with Lane Assist.
Currently Available
- Real Carbon Fiber Trunk Spoiler, H Style High Kick — Audi A4/S4 B9 Sedan
- Real Carbon Fiber Trunk Spoiler, MV Style Motorsport Version — Audi A4/S4 B9 Sedan
- Real Carbon Fiber Trunk Spoiler, MP Style — Audi A4/S4 B9 Sedan
- Real Carbon Fiber Side Mirror Covers (with Lane Assist option) — shared with A5/S5/RS5 (B9) Sportback and Coupe
Choosing the Right Option
All three spoiler styles are cut for the same A4/S4 B9 sedan trunk profile, so fitment is identical — the choice comes down to visual preference, from the H Style's higher kick-up to the more understated MV and MP profiles. For the mirror covers, confirm whether your vehicle is equipped with Lane Assist before ordering, since the camera cutout differs between the two versions.
Installation Reference
For torque specs, adhesive prep, and step-by-step spoiler mounting guidance, see our trunk spoiler installation guide.
Fitment Clarification
The trunk spoilers in this collection are cut specifically for the A4/S4 B9 Sedan's trunk lid profile. The mirror covers are a shared component, designed to fit the common B9-generation mirror housing used across the A4/S4 Sedan and the A5/S5/RS5 Sportback and Coupe — but they come in two versions depending on whether the vehicle has Lane Assist, so confirm your configuration before ordering.
Related Platforms
Working on a related B9-platform Audi? See our Audi A5/S5/RS5 B9 collection for parts matched to the Coupe and Sportback body styles.
Quick FAQ
Q: Is this a direct-fit spoiler, or will it need trimming or modification?
A: Direct fit — this spoiler is molded from the factory Audi A4/S4 B9 sedan trunk lid contour, so no cutting or trimming is required.
Q: Does this need to be painted to match my car?
A: No. This is real carbon fiber finished with a UV-resistant clear coat, so it installs as-is — no paint matching needed.
Q: How is it installed — will it require drilling into my trunk?
A: No drilling. Installation uses automotive-grade adhesive tape. Make sure your trunk lid is factory-painted (no wrap, vinyl, or recent ceramic coating) and install at 60–85°F for proper adhesion — see our installation guide for full details.
