2017–2023 Audi A4 S-Line / S4 B9 Sedan Single Deck Rear Trunk Spoiler – Carbon Fiber

Elevate the rear roofline of your Audi A4 B9 S-Line or S4 Sedan with this carbon fiber rear trunk spoiler. Molded for the factory trunk lid in a single-deck profile, it adds a purposeful, refined performance detail that complements the factory B9 body lines with a genuine carbon weave finish.

Build

• Material: Genuine carbon fiber, autoclave cured using a 3D design and CNC milling process for precise spoiler geometry, consistent panel quality, and an authentic weave appearance over carbon-look ABS or fiberglass alternatives
• Surface finish: High-gloss epoxy-polished top coat that showcases the natural carbon weave and provides lasting UV and moisture protection through sustained outdoor and driving exposure
• Configuration: Single-deck spoiler, supplied as a single piece
• Weight: Lightweight carbon construction adds negligible weight to the trunk lid

Design & Finish

• Single-deck profile: Clean, refined spoiler line that adds a performance-inspired finishing detail without an overly aggressive appearance
• Carbon aesthetic: Directional weave and gloss finish complement the factory B9 body lines for a coordinated, motorsport-grade look
• Factory-style integration: Precision-molded to follow the contours of the factory trunk lid for a clean, seamless fit

Fitment

• 2017–2023 Audi A4 S-Line B9 Sedan (4-door)
• 2017–2023 Audi S4 B9 Sedan (4-door)
• Fits the A4 S-Line and S4 factory trunk lid only — not compatible with the standard non-S-Line A4 or aftermarket trunk configurations
• Body style: Sedan only — does not fit Avant or Allroad body styles

Package Contents

• 1 × carbon fiber rear trunk spoiler
• Pre-applied adhesive tape for installation

Installation

• No-drill, adhesive-mounted: Installs with the included adhesive tape — no drilling and no permanent modification to the factory trunk lid
• Surface prep: Thoroughly clean, degrease, and dry the trunk lid at the spoiler position before fitting to ensure maximum adhesion
• Alignment: Dry-fit and check the spoiler sits centred and symmetrical across the trunk lid before final adhesion
• Professional installation recommended for the best positioning, panel alignment, and finish

Before You Install

• Confirm your car is an A4 S-Line or S4 B9 Sedan (2017–2023) before ordering — this will not fit the Avant or Allroad
• Work in moderate temperatures and allow the adhesive to cure fully before washing the car
• Installation is reversible, but adhesive removal and re-prep may be required if the spoiler needs repositioning