Audi A5 B9 S Line S5 Carbon Fiber Rear Bumper Lip Diffuser Valance with Third Brake Light – Aggressive OEM+ Styling, Motorsport-Inspired Rear Upgrade (2017–2019)

Enhance the rear profile of your Audi A5 B9 S Line or S5 B9 (2017–2019) with this premium Carbon Fiber Rear Bumper Lip Diffuser Valance with Integrated Third Brake Light. Designed to complement the sleek and aggressive styling of Audi’s B9 platform, this rear diffuser upgrade adds additional depth to the lower rear fascia while creating a more performance-inspired appearance.

Featuring an integrated third brake light design, this diffuser delivers a motorsport-inspired aesthetic while enhancing the visual presence of the rear bumper. The carbon fiber finish adds a premium racing-inspired touch that perfectly complements other Audi S Line and S5 exterior upgrades.

Precision-engineered specifically for A5 S Line and S5 B9 rear bumpers, this diffuser follows factory bumper contours for a clean OEM-style fitment. Whether upgrading a daily-driven A5 or completing a full OEM+ S5 build, this rear valance creates a sharper, wider, and more aggressive rear appearance without requiring a complete bumper replacement.

Constructed from durable automotive-grade materials, this rear diffuser is designed to withstand daily driving conditions including road debris, heat exposure, and weather elements. The premium carbon fiber finish provides a long-lasting appearance while pairing seamlessly with factory and aftermarket exterior modifications.

Key Features

• Direct Fit for Audi A5 B9 S Line & S5 B9 Models: Designed specifically for 2017–2019 B9 rear bumper applications for proper alignment and fitment.
• Integrated Third Brake Light Design: Adds a motorsport-inspired rear appearance while enhancing the aggressive diffuser styling.
• Premium Carbon Fiber Finish: Provides a high-end performance look that complements Audi’s S Line and S5 exterior design.
• Aggressive Rear Diffuser Styling: Enhances the lower rear bumper area with sharper lines and a more dynamic performance appearance.
• OEM+ Performance Design: Upgrades the factory rear styling while maintaining Audi’s clean and refined design language.
• Precision-Molded Factory Integration: Engineered to follow factory bumper contours for a seamless and professional appearance.
• Durable Automotive-Grade Construction: Built to handle everyday driving conditions while maintaining long-lasting appearance and durability.
• No Full Bumper Replacement Required: Designed as a rear bumper upgrade solution that enhances the factory setup without replacing the entire bumper.
• Complements Other Exterior Upgrades: Pairs perfectly with carbon fiber mirror caps, front splitters, side skirts, trunk spoilers, and exhaust upgrades.

Refine the rear styling of your Audi A5 S Line or S5 B9 with this performance-inspired carbon fiber diffuser upgrade. Designed to sharpen factory body lines and add a more aggressive rear presence, this diffuser creates the perfect OEM+ appearance for enthusiasts looking to enhance their Audi’s exterior styling.

Pair it with carbon fiber mirror caps, front splitters, side skirts, and trunk spoilers for a complete B9 performance-inspired build.

FITMENT:

Compatible With:

• 2017–2019 Audi A5 B9 S Line
• 2017–2019 Audi S5 B9

Detailed Fitment Guide

2019

• Audi A5 S Line Coupe 2-Door
• Audi A5 Quattro S Line Coupe 2-Door
• Audi A5 Sportback S Line Hatchback 4-Door
• Audi S5 Base Coupe 2-Door
• Audi S5 Premium Coupe 2-Door
• Audi S5 Premium Plus Coupe 2-Door
• Audi S5 Prestige Coupe 2-Door
• Audi S5 Sportback Base Hatchback 4-Door
• Audi S5 Sportback Premium Plus Hatchback 4-Door
• Audi S5 Sportback Prestige Hatchback 4-Door
• Audi S5 Sportback Technik Hatchback 4-Door

2018

• Audi A5 S Line Coupe 2-Door
• Audi A5 S Line Hatchback 4-Door
• Audi S5 Base Coupe 2-Door
• Audi S5 Base Hatchback 4-Door
• Audi S5 Premium Plus Coupe 2-Door
• Audi S5 Prestige Coupe 2-Door
• Audi S5 Sportback Premium Plus Hatchback 4-Door
• Audi S5 Sportback Prestige Hatchback 4-Door
• Audi S5 Sportback Technik Hatchback 4-Door

2017

• Audi S5 Base Convertible 2-Door
• Audi S5 Base Coupe 2-Door
• Audi S5 Progressiv Coupe 2-Door
• Audi S5 Technik Coupe 2-Door

Fitment Note: Designed specifically for Audi A5 S Line and S5 B9 rear bumper applications listed above. Please verify your rear bumper style and body configuration before purchase. Not designed for standard non-S Line rear bumpers without modification.

Please refer to the “Fitment” section in the product description for compatibility details.