Carbon Fiber LED Rear Diffuser – BMW G80 M3 / G82 G83 M4
Transform your G8X’s rear with an aftermarket upgrade that delivers performance styling and modern functionality. This Carbon Fiber LED Rear Diffuser integrates a factory-matched brake illumination, blending motorsport aesthetics with enhanced rear-end safety — wrapped in precision-engineered carbon fiber for the perfect finish.
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Key Features
• Full-width carbon fiber diffuser with integrated LED third brake light
• Constructed from real carbon fiber with a 2×2 twill weave pattern
• Lightweight yet rigid—designed to preserve structural form under dynamic conditions
• Direct-replacement for factory rear diffuser; requires drilling and wiring for LED integration
• Adds functional lighting and bold visual presence with OEM+ precision
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Compatible Models
• BMW G80 M3 Sedan (2021–Present) — both Base & Competition models
• BMW G82 M4 Coupe (2021–Present)
• BMW G83 M4 Convertible (2021–Present)
Fitment spans both Pre‑LCI and LCI bumper variants.
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What’s Included
• (1) Carbon Fiber LED Rear Diffuser (Single Piece with pre-attached wiring)
• Installation hardware not included on most products
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Why Buy From Eterna Motorworks
Eterna Motorworks is the standard in premium aftermarket automotive parts and services. With more than a decade of hands-on craftsmanship, we’ve earned the trust of enthusiasts and professional builders through unmatched quality, precision fitment, and enduring credibility. Each component is curated to elevate both aesthetics and functional performance—on both the street and at speed. If deliberate detail drives your build—welcome to the team.
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Professional installation is highly recommended.
Installation hardware not included on most products.
LED integration requires trimming, drilling, and wiring—please confirm before purchasing. Use OEM harness if possible.
For fitment specifics, installation guidance, and store policy details, please refer to our policies before purchasing.
Worldwide shipping available upon request.
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Your next mod starts here. Upgrade the build the right way with Eterna Motorworks.
Pairs well with
Carbon Fiber LED Rear Diffuser – BMW G80 M3 / G82 G83 M4
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Product Questions
Will this fit my vehicle?
This part is made for the models listed above. If you’re unsure, send us your year, make, and model and we’ll confirm fitment for you.
What’s included?
You’ll receive exactly what’s shown. Hardware is not included unless the product description says otherwise.
How difficult is installation?
We recommend professional installation. If you’re local, you can book an install with us directly. Some parts may need trimming, drilling, or adjustment depending on your setup.
Do you ship internationally?
Yes, we ship worldwide. Contact us if you need help placing an international order.
How do I confirm fitment before ordering?
Fitment details are listed on each product page. If you’re unsure or your build has unique specs, submit the form and our team will verify compatibility before you order.
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With over a decade of hands on experience, a growing portfolio of award winning show builds, and direct relationships with top-tier brands, we make sure you get premium products, trusted service, and real automotive expertise. Our team has built multiple award winning vehicles featured at top tier shows like SEMA and Bimmer Invasion. Everything we offer is tested, trusted, and backed by real world experience.
Eterna Motorworks can source or special-order nearly any component for your build — OEM-fitment parts, performance upgrades, carbon fiber aero, suspension, wheels, and even bespoke options depending on the platform. Click here to contact our team.
