BMW G20 M340i M Performance Style Gloss Black Rear Bumper Lower Diffuser 2019-Up

Enhance the rear styling and aerodynamic performance of your 2019-Up BMW G20 M340i with this M Performance Style Gloss Black Rear Bumper Lower Diffuser. Designed to deliver a more aggressive and performance-inspired appearance, this upgrade transforms the rear profile while maintaining a clean OEM-style fit.

The M Performance-inspired design improves airflow at the rear of the vehicle, helping increase stability and reduce turbulence at higher speeds. Engineered specifically for the G20 M340i platform, this diffuser integrates seamlessly with the factory rear bumper for a precise and factory-like installation.

Constructed from durable ABS plastic, this rear diffuser offers lightweight strength and long-term durability. The gloss black painted finish provides a premium high-shine look that complements factory trim and resists fading, chipping, and everyday wear.

Product Specifications

Key Features

• Designed for 2019-Up BMW G20 M340i models
• M Performance Style rear bumper lower diffuser
• Enhances rear-end aerodynamics and airflow management
• Improves stability and performance at higher speeds
• Durable ABS plastic construction for long-term use
• Gloss black finish for a premium OEM+ appearance
• Precision-molded to match factory rear bumper lines
• Direct clip-on installation with no drilling required
• Uses OEM mounting points for secure fitment
• Creates a more aggressive and sporty rear profile
• Ideal for daily driving, show builds, and performance styling

Configuration Options

• Gloss Black Finish – High-shine painted finish for a clean and aggressive look

Package Includes

• Rear bumper lower diffuser

Note: Designed specifically for M340i models. OEM hardware is reused during installation. Professional installation is recommended for best alignment and fitment.

Installation

• Direct clip-on installation
• Uses factory mounting points
• No drilling required
• No cutting required
• OEM hardware reused
• Professional installation recommended

Fitment

• 2019-Up BMW M340i Sedan
• 2019-Up BMW M340i xDrive Sedan
• Fits all 2019-Up BMW G20 3 Series M340i models

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.