Transform your M4’s rear with premium style and added functionality. This Carbon Fiber LED Rear Diffuser Kit offers integrated braking illumination paired with bold motorsport-inspired styling—all crafted to mesh precisely with factory bumper contours.

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Key Features

• Full-width rear diffuser with integrated center LED brake light

• Constructed from real carbon fiber with a 2×2 twill weave pattern

• Lightweight yet rigid—ensures structural integrity under rear-end loads

• Direct bolt-on replacement for factory diffuser—wiring and trimming required for LED function

• Creates an eye-catching OEM+ upgrade with functional visual safety enhancements

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Compatible Models

• BMW G82 M4 Coupe — model years 2021–Present

Designed specifically for the G82 body style

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What’s Included

• (1) Carbon Fiber LED Rear Diffuser with pre-wired LED module

• Installation hardware not included on most products

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Why Buy From Eterna Motorworks

Eterna Motorworks sets the standard in premium aftermarket automotive parts and services. With over a decade of hands-on craftsmanship, we’ve earned the trust of enthusiasts and pro builders worldwide through unmatched quality, precision fitment, and enduring credibility. Let your car stand out with performance-level styling that works—on and off the track.

For those who build with intention—welcome to the team.

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Professional installation is highly recommended.

Installation hardware not included on most products.

LED module requires trimming, drilling, and wiring—consult support if needed.

For fitment guidance, installation assistance, and store policy details, please refer to our store 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.