





Carbon Fiber Rear Diffuser with Brake Light - BMW G22/G23 4 Series
Transform the rear end of your BMW G22 4 Series (2021-2023) with the Carbon Fiber Rear Diffuser with Brake Light. This high-performance diffuser combines the stunning aesthetics of carbon fiber with functional enhancements to improve aerodynamics, add a sporty touch, and increase visibility. Designed to seamlessly integrate with your BMW G22, this rear diffuser not only enhances your car’s appearance but also optimizes airflow and adds a unique lighting feature for improved safety.
Key Features:
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Premium Carbon Fiber Construction:
- Crafted from high-quality carbon fiber, this rear diffuser offers a lightweight yet highly durable solution for enhancing the rear styling of your BMW G22 4 Series.
- Carbon fiber is known for its strength and rigidity, providing a sleek, race-inspired look while also offering high resistance to wear, scratches, and environmental factors.
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Aerodynamic Performance Enhancement:
- The rear diffuser helps improve aerodynamics, reducing drag and increasing downforce, which contributes to better stability and handling at higher speeds.
- By directing airflow more efficiently, the diffuser enhances the car’s overall performance, especially during high-speed driving, track sessions, or spirited driving on the road.
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Integrated Brake Light:
- Equipped with an integrated brake light, this rear diffuser improves safety by increasing visibility to other drivers, especially during night driving or in low-light conditions.
- The brake light not only provides additional illumination but also adds a modern, high-tech look to your BMW’s rear end.
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Aggressive Motorsport-Inspired Design:
- The exposed carbon fiber weave delivers a motorsport-inspired, aggressive look that elevates the rear profile of your BMW G22 4 Series.
- This diffuser integrates seamlessly with your car's existing design, giving it a refined yet dynamic appearance that complements other high-performance styling elements on your vehicle.
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Lightweight Performance Upgrade:
- The carbon fiber rear diffuser is lightweight, contributing to a reduction in overall vehicle weight, which improves acceleration, fuel efficiency, and handling.
- The reduction in weight enhances driving dynamics, making your BMW more agile and responsive on the road.
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Perfect Fitment for BMW G22 4 Series (2021-2023):
- Designed specifically for the 2021-2023 BMW G22 4 Series, the diffuser ensures a seamless fit that aligns perfectly with your car's rear bumper and body lines.
- The precision engineering of the diffuser guarantees an OEM-like finish, providing a factory-quality appearance with a touch of customization.
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Durable and Scratch-Resistant:
- Carbon fiber is naturally resistant to scratches, chips, and other forms of damage, ensuring that your rear diffuser remains looking pristine even after extended use.
- The diffuser is coated with a protective layer that helps preserve the carbon fiber’s glossy finish, guarding it against wear, UV rays, and environmental exposure.
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UV and Weather Resistant:
- The diffuser is treated with a UV-resistant finish, preventing fading or discoloration from prolonged exposure to sunlight, keeping it looking fresh and vibrant for years.
- Engineered to withstand various weather conditions, including rain, snow, and extreme temperatures, the diffuser maintains its structural integrity and appearance over time.
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Easy Installation:
- The Carbon Fiber Rear Diffuser with Brake Light is designed for easy, direct installation, utilizing existing mounting points on your BMW G22 4 Series.
- The kit includes all the necessary hardware for a straightforward and hassle-free installation, making it suitable for both professional installers and DIY enthusiasts.
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Customizable Finish:
- Available in gloss and matte finishes, the diffuser allows you to choose the finish that best suits your style and matches other carbon fiber components on your vehicle.
- The exposed carbon fiber weave enhances the sporty look of your car, offering a premium, high-performance touch to your BMW G22 4 Series.
The Carbon Fiber Rear Diffuser with Brake Light for BMW G22 4 Series (2021-2023) is the perfect combination of form and function, providing your BMW with improved aerodynamics, a more aggressive rear profile, and added safety features. With its high-quality construction, performance benefits, and sleek design, this rear diffuser offers an ideal upgrade for any BMW enthusiast looking to enhance the look and feel of their 4 Series. Whether you're driving on the road or at the track, this diffuser will provide an added touch of style and functionality.
We want you to have our parts as quickly as possible. Products that are in stock will be shipped and delivered domestically in 1–5 business days. It will take seven to twenty-one business days for international shipment. An email confirming that your order is being completed will be sent to you once you place it. For in-house orders, please allow a day for processing and the updating of the tracking number. The product page accurately shows the quantity.
Custom steering wheels typically take 20-25 business days for production, with an additional 5-7 business days for shipping. Production and delivery times may vary depending on the complexity of the order and the shipping destination. For more details, please refer to our Shipping Policy.
Our Return Policy permits returns only for products that are found to be defective. You have 30 days from the date of delivery to inspect the product and report any issues.
Regular Cleaning: Maintain carbon fiber parts by cleaning them regularly with a soft cloth and a mixture of mild soap and water. Avoid abrasive or harsh cleaners that could harm the finish.
Use Microfiber Pads and Cloths: Opt for microfiber pads and cloths when cleaning or applying protective coatings to prevent surface scratches.
Protect from Sun and Chemicals: Limit exposure to direct sunlight and harsh chemicals, as they can damage carbon fiber. When possible, use protective covers or park your vehicle in shaded areas.

Why Thousands of Enthusiasts Trust Us
Carbon Industries delivers premium, precision-engineered parts that elevate Vehicle performance and style—backed by expert support and a true passion for the culture. We don’t just sell parts; we fuel the lifestyle.
- Guaranteed Fitment for Your BMW: No guesswork—our parts are designed and tested to fit your exact model perfectly.
- Premium Materials, Always: We use only high-grade carbon fiber, forged metals, and performance-tested components.
- White-Glove Customer Support: Our team of BMW specialists is here to guide you with expert, concierge-level care.
- Trusted by the Elite Vehicle Community: From daily drivers to show builds, our parts are featured on some of the cleanest builds worldwide.

Let customers speak for us
FAQ
Will these parts fit my specific Vehicle model and year?
Yes — every product page includes a “Will This Fit” section to ensure compatibility. If you’re unsure, just send us your VIN or model/year, and our team will confirm fitment for you within 24 hours. We specialize in BMW and European vehicles, so you’re in good hands.
Are these genuine carbon fiber or carbon fiber overlay parts?
We offer only full carbon fiber options. Each listing clearly specifies the construction material. Rest assured, we only source high-quality parts that are durability-tested and made to OEM or better standards.
How long does shipping take and where do you ship from?
Most orders ship from our Irvine, CA warehouse within 1–3 business days. Domestic delivery typically takes 3–7 business days. International shipping times vary by country. Each product page includes real-time shipping estimates based on your location. Certain made to order products will take up to 3-4 weeksfor delivery, including production time.
Do I need professional installation or can I install it myself?
Many of our mods are designed for direct bolt-on installation and can be installed at home with basic tools. However, for certain parts like aero kits or performance components, we recommend professional installation for best results. Each product page includes install difficulty and notes. We offer professional installation at our Santa Clara, CA location.
What if the product doesn’t fit or I change my mind?
No worries — we offer hassle-free returns within 30 days of delivery. If the part doesn’t fit due to an error on our end, we’ll cover the return shipping. For all other returns, we make it easy to exchange or get a refund. See our full Returns & Warranty Policy for details.
Are your parts tested for quality and durability?
Absolutely. All of our products go through quality control checks and are either TUV-certified, ISO-certified, or tested by our in-house team and verified installers. We don’t sell anything we wouldn’t put on our own cars.
Do you offer warranties on your parts?
Yes. Most of our products come with a 90-day limited warranty against manufacturing defects. Some premium items offer extended warranties — details are listed on the product pages. We’re committed to quality and stand behind what we sell.
Can I finance or pay in installments?
Yes — we offer Shop Pay, Affirm, AfterPay, and Klarna at checkout. You can split your purchase into 4 interest-free payments or choose longer-term plans if needed. It’s quick, easy, and won’t affect your credit score (in most cases)