2014-2018 BMW X5 F15 AF-2 Rear Diffuser (GFK) - 1 Piece (S) - 117853
Part#: ed_117853
Aero Function
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Fullerton, CA
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⚠️FIBERGLASS ➡ REQUIRES PREP WORK⚠️ SHIPS FROM USA
Upgrade the appearance and performance of your 2014-2018 BMW X5 with the F15 AF-1 Wide Body Rear Diffuser ( GFK )(S) from Aero Function. This accessory is designed to enhance both the aesthetics and potentially improve the functionality of your vehicle. The Diffusers is engineered to work harmoniously with your car’s aerodynamic design, crafted from premium FRP materials, offering a bold, aggressive look that accentuates the sleek lines of your BMW X5.
The F15 AF-1 Wide Body Rear Diffuser ( GFK )(S) is specifically designed to integrate seamlessly with your vehicle's existing profile, ensuring both form and function.
Made from lightweight yet durable materials, the F15 AF-1 Wide Body Rear Diffuser ( GFK )(S) adds little to no extra weight, and its aerodynamic shape may help reduce drag, potentially improving your car's performance.
Professional installation is recommended for the F15 AF-1 Wide Body Rear Diffuser ( GFK )(S). While this Diffusers is made to fit the 2014-2018 BMW X5, please note that mounting hardware is not included. You will need to source your own screws, bolts, and possibly custom brackets to ensure a secure and precise fit.
One of the most notable features of the F15 AF-1 Wide Body Rear Diffuser ( GFK )(S) is its customizable finish. You can paint it to match your vehicle's color, giving you the opportunity to create a personalized look that reflects your individual style.
At Aero Function, we take pride in the craftsmanship of our products, and the F15 AF-1 Wide Body Rear Diffuser ( GFK )(S) is no exception. Each unit undergoes stringent testing to meet performance standards and ensure quality.
If you're looking to elevate the style and performance of your BMW X5, the F15 AF-1 Wide Body Rear Diffuser ( GFK )(S) from Aero Function is an excellent choice. Combining advanced design with top-tier materials, it’s the perfect way to enhance your vehicle.
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All Overstock products are sold on a first come, first serve basis. Overstock products are sold as is, and all sales are final. Overstock products may not be returned or exchanged.
Aero Function stands at the intersection of design and performance, crafting premium body kits tailored for vehicles like the BMW X5. With years of hands-on experience in developing aerodynamic upgrades, each kit is engineered to elevate both visual presence and on-road dynamics. The result is not just a cosmetic upgrade, but a transformation that gives your BMW X5 a sharper, more aggressive identity.
Every Aero Function body kit for BMW X5 is built using carefully selected materials to suit different performance needs. GFK (Glass Fibre Komposite) offers durability with flexibility, CFP (Carbon Fibre Plastic) delivers lightweight strength with UV resistance, and Pur Rim (Polyurethane Plastic) provides a balance of rigidity and impact absorption. All components are manufactured in-house by skilled technicians, ensuring consistent quality and precision across every product.
When installing Aero Function GFK components, some level of customization may be required. Although these parts are developed for precise fitment, minor adjustments can help achieve the best results. It is recommended to perform a dry fit before final installation. In some cases, trimming or additional fiberglass work may be needed to perfect alignment. Taking these extra steps ensures your BMW X5 gets a seamless, factory-like finish, allowing the body kit to truly complement the vehicle’s overall design and stance.








New: A brand-new, unused, unopened, item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in our retail store. To be installed professionally by a bodyshop with a valid automotive repair business license. Fiberglass parts always require prep work before they can be primed and painted. This product is made with fiberglass material, therefore it will exhibit chips, breaks, cracks, waves, scratches and holes which require modification. It is necessary to dry fit and drill mounting holes and preform body work before paint. Cutting and adding of fiberglass may be required for proper fitment. Ships direct from the manufacturer or a distributor. Primer finish. Hand layup is the manufacturing process used for the majority of our fiberglass parts. Hoods require hood pins. We do not offer any guarantee of fitment on vehicles that have been in involved in accidents and/or have body damage or customization.
Aero Function diffusers are aftermarket aerodynamic accessories designed specifically for off-road and show use. Aero Function disclaims any responsibility for damage or injury resulting from their use. These diffusers are not intended for public road use and are not ‘direct bolt-on’ parts. They often require extensive preparation, such as sanding, fitting, or custom bodywork. It’s important to note that improper handling or installation can lead to common issues, such as potential warping, cracking, or fitment challenges.
Aero Function diffusers typically fit below the rear bumper, and in many cases, the bumper may need to be modified to accommodate the diffuser. Many diffusers are designed to fit specific bumpers or trims, so careful attention should be paid to design and compatibility during selection and installation.
Installation of Aero Function diffusers usually requires separate mounting hardware, which is not included in the package. This hardware may consist of L-brackets, bolts, screws, washers, and other fasteners. L-brackets are commonly used to attach the diffuser securely to the vehicle's chassis or bumper, while bolts and screws ensure a tight fit. Additional supports or reinforcements might be necessary, depending on the design and specific fitment of the diffuser. Since this hardware is not included, installers will need to source the appropriate materials separately to ensure compatibility with both the diffuser and the vehicle.
For optimal results, Aero Function recommends professional installation by a custom shop experienced with fiberglass components and aftermarket accessories. Traditional auto repair shops may lack the expertise needed for the nuances of proper fiberglass fitment and hardware requirements.
Disclaimer: Aero Function diffusers are designed strictly for off-road and show use. Due to strict Department of Transportation (DOT) regulations, most Aero Function diffusers are not street legal. Aero Function does not endorse or recommend using these diffusers on public roads or highways.