2017–2019 Audi A5 S-Line / S5 B9 Front Bumper Diffuser Lip – Carbon Fiber

Make a commanding front-end statement on your Audi A5 S-Line or S5 B9 with this carbon fiber front bumper diffuser lip. Spanning 180 cm for full-width lower coverage, it adds dramatic visual width and a pronounced ground-hugging forward presence — a comprehensive front-end transformation rather than a subtle trim addition.

Build

• Material: Genuine carbon fiber, manufactured for precise lip geometry, consistent panel surface, and an authentic weave appearance over carbon-look ABS or fiberglass alternatives
• Surface finish: High-gloss epoxy-polished and UV-protected finish that showcases the natural carbon weave and resists UV exposure, moisture, and road debris through sustained outdoor and driving use
• Configuration: Single-piece full-width diffuser lip for the lower front bumper
• Panel width: 180 cm across

Design & Finish

• Aggressive stance: Lip profile adds visual width and a lower, ground-hugging forward presence for a more commanding, track-inspired front end
• Full-width coverage: The 180 cm span covers the complete lower front bumper for an integrated finish with no exposed factory sections
• Carbon aesthetic: Directional weave and gloss finish complement the sporty S-Line and S5 bodywork for a coordinated, motorsport-grade look

Fitment

• 2017–2019 Audi A5 S-Line (B9)
• 2017–2019 Audi S5 (B9)
• Fits the A5 S-Line and S5 factory front bumper only — not compatible with the standard non-S-Line A5, aftermarket bumpers, or non-B9 configurations
• Confirm your body style and front bumper configuration before ordering

Package Contents

• 1 × carbon fiber front bumper diffuser lip
• Installation hardware

Installation

• Surface prep: Thoroughly clean and degrease the front bumper before installation to ensure correct panel seating and secure fitment
• Alignment: Dry-fit and check the lip sits centred and even across the bumper, with consistent panel gaps on both sides, before final fitting
• Professional installation strongly recommended — a panel of this width requires careful positioning to achieve symmetrical alignment and a clean finish
• Plan for a second pair of hands during fitting given the panel's full-width span

Before You Install

• Confirm your car is an A5 S-Line or S5 B9 (2017–2019) before ordering — this will not fit the standard non-S-Line A5
• Verify your factory front bumper is unmodified before ordering
• Front lips sit low and are exposed to kerbs, driveway ramps, and road debris — take care when parking nose-in