3DDesign Carbon Rear Diffuser for G22 and G23 BMW 4 Series M Sport

The 3DDesign Carbon Rear Diffuser for the G22 and G23 BMW 4 Series M Sport adds a bold, performance-inspired upgrade to the rear of the vehicle. Crafted from high-quality 2×2 twill dry carbon fiber, it is lightweight yet durable, providing a refined, motorsport-inspired appearance. Designed to integrate seamlessly with the M Sport rear bumper, the diffuser features sculpted fins that enhance visual depth and accentuate the 4 Series’ sporty stance. Precision-engineered for perfect fitment, it elevates both style and character while reflecting 3DDesign’s signature craftsmanship, giving the G22 and G23 a more aggressive, dynamic rear profile.

Gtechniq EXOv5 Coating

• This optional coating forms a durable, long-lasting bond that will not wash off or break down, providing reliable, extended protection for paintwork and other treated surfaces. It creates a strong protective barrier that helps shield against damaging environmental contaminants such as dirt, road grime, and pollutants, while also offering enhanced scratch resistance to maintain a clean, high-gloss finish over time. For those seeking maximum durability and performance, the coating can be applied in multiple layers to increase thickness, strengthen protection, and further extend the life of the surface.

Features

• Made from high-quality 2×2 twill dry carbon fiber for lightweight strength and durability
• Aggressive fin design enhances rear aesthetics and adds a motorsport-inspired look
• Precision-engineered for seamless OEM-plus fitment
• Compatible with OEM exhaust or 3DDesign quad-tip setup
• Lightweight construction preserves performance and handling
• Reflects 3DDesign’s signature craftsmanship and attention to detail

Applications

• BMW 420d M Sport: G22, G23 | 2021-present
• BMW 420d xDrive M Sport: G22, G23 | 2021-present
• BMW 430d xDrive M Sport: G22, G23 | 2021-present
• BMW M440i xDrive M Sport: G22, G23 | 2021-present
• BMW 420i M Sport: G22, G23 | 2021-present
• BMW 430i M Sport: G22, G23 | 2021-present
• BMW M44oi M Sport: G22, G23 | 2021-present
• BMW 420i xDrive M Sport: G22, G23 | 2021-present
• BMW 430i xDrive M Sport: G22, G23 | 2021-present
• BMW M44oi xDrive M Sport: G22, G23 | 2021-present

Notes

• Only compatible with vehicles equipped with M Sport packages
• Hands-free tailgate function may be impacted after install
• For Non-M440i installation, OEM parts are needed, please contact us for more information

About 3DDesign

3DDesign is a Japan-based BMW specialist recognized for OEM-level fit, refined aesthetics, and real-world performance. Drawing on motorsport development, the brand engineers aerodynamic components, wheels, exhaust systems, suspension, and interior accessories using advanced CAD / CAM, CFD, and road / track testing. Its catalog emphasizes lightweight, high-quality materials — such as carbon fiber, forged aluminum, and titanium — paired with precise tolerances for seamless integration with factory systems. The result is a cohesive, OEM-plus driving experience that elevates both form and function across modern BMW platforms.