BMW M5 F90 3D Style Carbon Fiber Rear Diffuser 2018-2021

Upgrade the rear-end appearance of your 2018-2021 BMW M5 F90 with this 3D Style Carbon Fiber Rear Diffuser, designed to give the vehicle a sharper, more aggressive, and performance-inspired look.

This diffuser enhances the factory rear bumper with a bold 3D-style profile, helping complete the M5’s exterior with a cleaner and more dynamic appearance. Its sculpted design adds depth and visual presence while maintaining a vehicle-specific fit for the F90 platform.

Constructed from carbon fiber and finished with a glossy clear coat, this rear diffuser delivers a premium exterior upgrade built for both durability and standout styling.

Product Specifications

Key Features

• Designed for 2018-2021 BMW M5 F90 models
• 3D-style design adds a more aggressive and sculpted rear-end appearance
• Carbon fiber construction delivers a lightweight, premium exterior upgrade
• Glossy clear coated finish provides a sleek and refined look
• Enhances the rear bumper with a performance-inspired diffuser profile
• Durable construction designed for long-lasting exterior styling
• Pairs well with other carbon fiber exterior upgrades such as front lips, side skirts, mirror caps, and spoilers

Configuration Options

• Gloss Carbon Fiber Finish: Clear coated carbon fiber finish for a premium exterior upgrade

Package Includes

• 1 Rear Diffuser

Note: Professional installation is recommended to ensure proper alignment, secure mounting, and best overall fitment.

Installation

• Installs onto the rear bumper as a diffuser upgrade
• Test fitting is recommended before final installation
• Additional hardware, adhesive, or minor adjustments may be required depending on vehicle condition and installer preference
• Professional installation is strongly recommended

Fitment

• 2018-2021 BMW M5
• Chassis: F90

United States: Free shipping available to the lower 48 states across all items. Other states will incur a shipping charge.

Worldwide: Free shipping is available for Complete Headlights, Taillights, DRLs. For custom headlight retrofits, carbon fiber products, and performance products, there will be a shipping charge.  

Please note:
• For Retrofits, you are purchasing a headlight modification service.
• If you select "Shipping own headlights to BayOptiks for modification", you are required to send us your headlights.
• If you choose "Purchase new OEM headlights", we will order and modify a new OEM headlight for you.
• Once your customizations are complete, we will ship it to you!

• Complete Headlights: 3-5 business days for order processing plus shipping time.
• Custom & Pre-Built Headlights: 6-8 weeks depending on the complexity and component availability.
• New OEM and cores: 6-8 weeks plus an additional 4-8 weeks as these are special orders base on the vehicle VIN due to different versions (North American, European, etc.)
• DRLs, Taillights, Brake Pads, and Carbon Fiber Aero: 3-5 business days for order processing, plus shipping time.
• Lens Replacements: 1-3 weeks plus shipping time.

Please note, we do not have control over the time frames of our vendors, manufacturers, and delivery services as they may delay processes in regards to components and shipment.