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BMW X3M F97 includes LCI - 3 piece carbon fiber rear diffuser with rear corner splitters [UNIT EXCLUSIVES]

Fits BMW F97 X3M (LCI) (2022–2024), BMW F97 X3M (Pre-LCI) (2019–2021)

Text 609-525-4865

Original price was: $1,299.00.Current price is: $899.00.

You save $400.00 (31%)

Limited stock Order now before it sells out.

Coming soon — ask us for timing

BMW X3M F97 Carbon Fiber Rear Diffuser Kit (2018–2024) – 3-Piece LCI & Pre-LCI Upgrade with Rear Splitters | UNIT 17 Exclusive


What’s Included:

  • 1x 3-Piece Carbon Fiber Rear Diffuser

  • 2x Carbon Fiber Rear Corner Splitters

  • Precision Pre-Drilled Mounting Points

  • Designed for OEM Screw Hole Alignment – No Modifications Needed


Vehicle Compatibility:

  • BMW X3M F97 (2018, 2019, 2020, 2021, 2022, 2023, 2024)

  • Fits Both Pre-LCI and LCI (Facelift) Models

  • ❌ Does NOT fit BMW X4M F98


Product Overview:
Upgrade the look and aerodynamics of your BMW X3M F97 with the UNIT 17 Carbon Fiber Rear Diffuser Kit, a high-performance styling upgrade designed for both LCI and Pre-LCI models (2018–2024). This 3-piece rear diffuser set features a central diffuser and rear corner splitters, crafted from 100% genuine carbon fiber with a deep gloss finish and UV-resistant clear coat.

Designed using advanced 3D scanning technology, this rear diffuser ensures precision fitment, following the exact factory body lines of the X3M. Each piece is test-fitted in-house to guarantee a seamless, OEM-style install—no trimming or cutting required.

This is a track-inspired, performance-ready styling component built specifically for BMW enthusiasts who demand both form and function. Engineered to reuse your existing OEM mounting locations with pre-drilled screw holes, this kit installs in minutes and instantly transforms your rear-end appearance with a more aggressive, motorsport look.


Key Features & Benefits:
✅ Perfect Fit for BMW X3M F97 (2018–2024) – Designed for both LCI and Pre-LCI trims
✅ 3-Piece Carbon Fiber Design – Includes main diffuser and rear corner splitters
✅ Aggressive M-Inspired Styling – Sharpens the rear profile with a sporty, race-ready finish
✅ Real Carbon Fiber Construction – Lightweight, strong, and highly durable with a glossy UV-protected finish
✅ OEM Fitment – Pre-drilled and installs using factory screw points—no custom work needed
✅ Exclusive to UNIT 17 – Not sold anywhere else


Why Buy Carbon Fiber Diffusers from UNIT 17?
UNIT 17 is a trusted U.S.-based brand specializing in BMW carbon fiber body kits, aero upgrades, and custom styling solutions. Every part is developed using precision CAD modeling, real-vehicle scanning, and tested in-house to meet the highest quality and fitment standards. We don’t sell off-the-shelf products—we create exclusive, custom-designed aero built for enthusiasts.

  • BMW F97 X3M (LCI) 2022
  • BMW F97 X3M (LCI) 2023
  • BMW F97 X3M (LCI) 2024
  • BMW F97 X3M (Pre-LCI) 2019
  • BMW F97 X3M (Pre-LCI) 2020
  • BMW F97 X3M (Pre-LCI) 2021

Fitment guarantee — If a part doesn’t fit the vehicle listed on its product page, contact us before installing and we’ll cover the return shipping for a refund or replacement.

Complete your BMW

More diffusers for BMW

See all diffusers for the BMW F97/F98 X3M/X4M (LCI)

Why Unit17

Carbon parts from people who drive them

LOCATION: NJ, USA

Founded in 2014, Unit 17 is the brand created by car enthusiasts who specialize in aftermarket carbon fiber for sports cars, luxury vehicles and performance vehicles.

Our company aims to provide the highest quality pre-preg carbon fiber styling parts.  Being able to relate to fellow enthusiasts who share our passion for motoring is the key to Unit 17’s success.

Taking pride in our quality, service, and product fit is one of our top priorities.

Ask about fitment

Tell us what you drive and we’ll confirm this part fits before you order — usually within a few hours.

Year, make, model and any existing mods — e.g. 2022 BMW G80 M3, M Performance lip

The product you’re looking at is sent with your question.