Upgrade the rear appearance of your BMW 4 Series with this Gloss Black Rear Diffuser featuring an integrated center LED brake light. Designed for 2021-2026 BMW 4 Series G22 Coupe and G23 Convertible models with the M Sport rear bumper, this diffuser adds a more aggressive and sporty appearance while maintaining a clean factory-style fit.
The sculpted fins, gloss black finish and vertical center LED light create a sharper rear profile and complement the quad round exhaust setup. Made from durable ABS material for everyday use and designed as a direct replacement for the original lower rear diffuser.
Important Fitment: For M440i / M440i xDrive models, this diffuser is compatible with round exhaust tips only. It does not fit vehicles retaining the factory rectangular exhaust outlets. Please compare your rear bumper and exhaust configuration before ordering.
5 Key Features
1. Vehicle-Specific Fitment
Fits 2021-2026 BMW 4 Series G22 Coupe and G23 Convertible with M Sport rear bumper. Compatible with 430i, 430i xDrive, M440i and M440i xDrive depending on exhaust configuration.
2. M440i Round Exhaust Tips Only
For M440i models, this rear diffuser is designed for vehicles converted to or equipped with round exhaust tips. Not compatible with factory rectangular exhaust outlets.
3. Integrated Center LED Brake Light
Features a slim vertical red LED center light that gives the rear end a distinctive performance-inspired appearance and improves visual presence when illuminated.
4. Gloss Black Sporty Design
High-gloss black finish with aggressive vertical diffuser fins enhances the rear bumper and complements quad exhaust tip setups.
5. Durable ABS Construction
Manufactured from automotive-grade ABS material for good strength, impact resistance and long-term exterior use. Professional installation is recommended for best fitment.
Fitment Note
Fits: 2021-2026 BMW 4 Series G22 Coupe / G23 Convertible
Models: 430i / 430i xDrive / M440i / M440i xDrive
Rear Bumper: M Sport Only
M440i: Round Exhaust Tips Only
Does NOT Fit: G26 Gran Coupe / Standard Rear Bumper / M440i with Factory Rectangular Exhaust Tips
