Exterior Components› Body Panels and Components

Ausen Performance

Carbon Fiber Rear Diffuser

$659.99

SKU: products-carbon-fiber-rear-diffuser-bmw-e90

In Stock
In Stock
Ships by Sep 13
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Ausen Performance carbon fiber rear diffuser is a performance upgrade for the BMW E90 3 Series Sedan. Crafted from premium 2x2 weave carbon fiber with a clear coat finish, it offers a blend of lightweight durability, aerodynamic efficiency, and aggressive styling. This diffuser is designed exclusively for the 2006–2012 BMW E90 3 Series Sedan models equipped with the M-Sport package, ensuring a seamless, OEM-like fitment.
Show original supplier description
The Ausen Performance Carbon Fiber Rear Diffuser is a precision-engineered upgrade designed to transform the aesthetic and aerodynamic profile of your BMW E90 3 Series Sedan. This rear diffuser is specifically designed for a perfect, seamless fit on the BMW E90 3 Series Sedan models manufactured between 2006 and 2012, provided they are equipped with the M-Sport package. Its aggressive and stylish design not only enhances the visual appeal of your vehicle's rear but also contributes to improved aerodynamic efficiency by optimizing airflow, reducing drag, and increasing rear stability. The package includes the carbon fiber rear diffuser along with 3M adhesive and screws to facilitate an easy installation process. Ausen Performance highlights that these units are custom-made to order, ensuring superior quality and attention to detail for a truly premium exterior upgrade.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandAusen Performance
Part Numberproducts-carbon-fiber-rear-diffuser-bmw-e90
CategoryExterior Components

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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