2017–2019 Audi A4 B9 Base Sedan Carbon Fiber Rear Bumper Diffuser
599.99€ 666.66€
Sold By: Carbon Fiber Car Parts
SKU: LC-AC-P-3972949344338
Categories: Rear Diffusers
Product specifications
| Vehicle Make | Audi |
|---|---|
| Vehicle Model | A4 |
| Generation / Chassis | B9 |
| Production Years | 2017-2019 |
| Part Type | Rear Diffuser |
| Placement | Rear |
| Material | Carbon Fiber |
| Finish | Gloss |
| Weave Pattern | 3x3 Twill |
Carbon Fiber Rear Bumper Diffuser for 2017–2019 Audi A4 B9 Base Sedan
Carbon Fiber Construction
The diffuser is produced with 3x3 woven carbon fiber and finished with a gloss UV-protected clear coating. The exposed carbon weave is designed to complement other carbon fiber exterior upgrades while creating a more distinctive lower rear profile.
The UV-protected clear finish helps protect the visible carbon surface from normal environmental exposure while maintaining its gloss appearance.
Replacement-Style Rear Diffuser
This is a replacement-style rear bumper diffuser rather than an add-on lip. The factory lower diffuser is removed before the carbon fiber replacement is installed in its place.
The design follows the lower rear bumper area of compatible A4 B9 Base Sedan models and is intended primarily as an exterior styling upgrade. No specific downforce, drag reduction or handling improvement is claimed unless supported by product-specific aerodynamic testing.
Installation
Installation involves removing the factory rear diffuser and fitting the replacement carbon fiber unit. Self-tapping screws are included according to the current product specification.
Test-fit the diffuser before final installation and confirm that all mounting points and edges align correctly. Professional installation is recommended, especially if you are unfamiliar with bumper trim removal or panel alignment.
Confirm Your A4 B9 Rear Bumper Before Ordering
This product should be ordered based on the actual rear bumper configuration rather than model year alone. It is specifically positioned for the 2017–2019 Audi A4 B9 Base Sedan and should not be assumed to fit S line, S4 or later B9.5 bumper designs.
Carbon Fiber Car Parts
Carbon Fiber Car Parts for Premium & Performance Vehicles
Explore a wide selection of carbon fiber car parts available from independent sellers on Lux Carbon. This store brings together exterior styling and aerodynamic upgrades for drivers looking to give their vehicle a sharper, more distinctive appearance while taking advantage of the lightweight character and premium finish associated with carbon fiber.
Browse parts for popular European performance and luxury vehicles including BMW, Mercedes-Benz, Audi, Porsche and other makes. Available products can include complete carbon fiber body kits as well as individual components designed for targeted exterior upgrades.
Shop Carbon Fiber Exterior Parts
The collection covers many of the most popular carbon fiber upgrades used in modern automotive styling. Depending on vehicle model and seller availability, you can find:
- Carbon fiber front lips and splitters for a lower and more aggressive front profile.
- Rear diffusers designed to transform the appearance of the rear bumper.
- Spoilers and wings ranging from subtle OEM-style upgrades to motorsport-inspired designs.
- Carbon fiber mirror covers for a clean detail upgrade without replacing major body panels.
- Carbon fiber hoods and engine covers for high-impact styling and reduced component weight on selected applications.
- Side skirts and extensions that visually lower the vehicle and complement front and rear aerodynamic parts.
- Complete carbon fiber body kits for customers planning a coordinated exterior transformation.
Carbon Fiber Parts for BMW, Mercedes-Benz, Audi & Porsche
Modern performance cars are particularly well suited to carbon fiber styling. Many upgrades are developed around factory bumper shapes and popular performance packages, making it possible to create an appearance inspired by high-performance factory models while retaining the original character of the vehicle.
BMW owners can explore carbon fiber styling for M Sport and M models, while Mercedes-Benz customers can find parts for AMG-style applications. Audi and Porsche vehicles can also be upgraded with front splitters, diffusers, spoilers, mirror covers and other exterior carbon components.
Product compatibility varies by model, generation, body style and factory equipment. Always review the individual product description and fitment information before ordering.
Real Carbon Fiber Styling
Carbon fiber has become one of the most recognizable materials in premium automotive design. Its woven surface provides a technical appearance that works particularly well with performance vehicles, sports cars and luxury models.
Different products may use different construction methods, finishes and carbon patterns. Listings can include glossy or matte finishes, exposed carbon fiber components, carbon overlays and composite parts with carbon fiber surfaces. Exact material specifications are provided on the individual product page whenever supplied by the seller.
Build a Complete Carbon Fiber Exterior
One of the best ways to upgrade a vehicle is to treat the exterior as a complete design rather than adding unrelated parts individually. A front splitter can be paired with side skirt extensions, a rear diffuser and a spoiler to create a consistent appearance around the entire vehicle.
Smaller upgrades such as mirror covers or trim pieces can also be used as a starting point before moving to larger components such as hoods, diffusers or full body kits.
Lux Carbon makes it easier to browse multiple styles and applications in one place, allowing buyers to compare available carbon fiber automotive parts from independent sellers before choosing the components that best match their vehicle.
Find Carbon Fiber Car Parts for Your Vehicle
Start by selecting the vehicle manufacturer, model and generation whenever this information is available. Pay particular attention to differences between standard bumpers, sport packages and performance variants because exterior components are often designed for one specific configuration.
Whether you are looking for a subtle carbon fiber accent or planning a complete exterior conversion, this collection provides access to carbon fiber parts for a growing range of premium and performance vehicles.
Browse carbon fiber car parts on Lux Carbon and discover new exterior upgrades for your vehicle.
