Carbon Fiber Rear Trunk Spoiler for 2017-2023 Audi A4 Sline S4 B9 B9.5 Sedan
Available in stock (20)
Carbon Fiber Rear Trunk Spoiler for 2017-2023 Audi A4 S-Line / S4 B9 & B9.5 Sedan
The Audi A4 B9 is one of the best-selling Audi sedan platforms globally — a wide, flat rear trunk lid with a clean trailing edge that is one of the most popular carbon trunk spoiler canvases in the European and North American aftermarket. The B9 A4's rear trunk lid is shared across the B9 (2017–2019) and B9.5 LCI facelift (2020–2023), meaning a single spoiler profile fits the complete 7-year B9 production run of the A4 S-Line and S4 Sedan. This carbon fiber rear trunk spoiler is a direct replacement for the factory B9 A4/S4 trunk spoiler, replacing it with genuine 3×3 twill weave carbon fiber and adding a purposeful trailing edge accent at the B9's wide, flat trunk lid surface. Tape-on installation, no drilling required. Ships from LA warehouse in approximately 2 business days.
B9 & B9.5 Full-Platform Coverage (2017–2023)
The A4 B9's rear trunk lid geometry is unchanged from the 2017 launch through the B9.5 LCI facelift in 2020 — the B9.5 facelift updated the front fascia, headlights, and interior but retained the same rear trunk lid and spoiler mounting position. This spoiler fits the complete B9/B9.5 A4 S-Line and S4 Sedan production run without modification. A4 Quattro, A4 FWD, A4 S-Line, and S4 Sedan all confirmed across both B9 and B9.5 generations.
Key Features
- B9 & B9.5 Full-Platform Sedan Fitment (2017–2023): CAD-engineered and real-car tested for the Audi A4 S-Line, A4 Quattro, and S4 B9 and B9.5 Sedan (4-Door) — all variants confirmed across both generations. Direct replacement for the factory trunk spoiler. Double-sided adhesive tape included — no drilling, no modification to the factory trunk lid.
- B9 Sedan Trunk Lid Profile: Designed for the B9/B9.5 Sedan's wide, flat rear trunk lid trailing edge — the classic three-box sedan trunk position. Distinct from the A5 Coupe fastback-style trunk, the B9 Sedan trunk spoiler sits at a lower, wider trailing edge for a more understated but purposeful carbon accent.
- Genuine 3×3 Carbon Fiber: Premium 3×3 twill weave carbon fiber with UV-resistant high-gloss double-layer clear coat. Real carbon throughout, not ABS with carbon wrap. At $181.99 and 2 kg, this is one of the most accessible genuine carbon exterior upgrades available for the B9/B9.5 A4/S4 platform.
- UV-Resistant High-Gloss Finish: Double-layer UV-protective clear coat locks in carbon gloss and resists fading and surface hazing over time on the B9 Sedan's exposed trunk spoiler surface.
- Fast US Dispatch: Best-selling B9 A4/S4 spoiler — ships directly from LA warehouse in approximately 2 business days for stock orders.
Product Specifications
| Feature | Details |
|---|---|
| Material | 3×3 Twill Weave Carbon Fiber |
| Finish | High-Gloss, Double-Layer UV-Protected Clear Coat |
| Fitment | 2017–2023 Audi A4 S-Line / A4 Quattro / S4 B9 & B9.5 Sedan (4-Door) |
| Installation | Direct Replacement, Double-Sided Adhesive Tape, No Drilling |
| Weight | ~2,000 g |
Note: Fits 2017–2023 Audi A4 S-Line, A4 Quattro, and S4 B9/B9.5 Sedan (4-Door). Not for A4 Avant (wagon) or A5/S5 Coupe — different trunk lid geometry. Tape-on installation, no drilling required.
Add a genuine carbon trunk spoiler to your B9/B9.5 A4 S-Line or S4 Sedan — add to cart now.
Couldn't load pickup availability
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Quick order list
Clients Love Us
Stephanie L.
Ordered the BMW front bumper fog light grille and the fitment was absolutely perfect. Gloss black finish looks factory-fresh and the quality is outstanding. Installation took about 30 minutes — no drilling required. Highly recommend AlchemyRide!
Marcus R.
Fast shipping, great packaging, and the part arrived in perfect condition. The grille fits my F23 like a glove — exactly as described. Customer service was also super responsive when I had a fitment question. Will definitely order again.
David K.
I've bought aftermarket parts from many stores but AlchemyRide stands out for quality and value. The part was well-made, fit perfectly, and the price was very competitive. My BMW looks aggressive and clean — exactly what I wanted.
Jenny T.
Excellent product and super easy to install. The gloss black finish matches my M Sport bumpers perfectly. Shipping was faster than expected and the part was well-packaged. Very happy with my purchase — my car looks completely transformed!