Turner Motorsport Turner Carbon Fiber Diffuser - G20 M340i / xDrive 013748LA01
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Turner Carbon Fiber Diffuser - G20 M340i / xDrive

Upgrade the exterior styling on your BMW G20 M340 with the Turner In-House engineered Carbon Fiber Rear Diffuser. Using all factory mounting locations, this diffuser is a direct bolt-on upgrade that can be installed in minutes. Featuring a deep profile, an aggressive fin design, and hand-laid 2x2 pre-preg carbon fiber, this exclusive design from Turner Motorsport will be sure to turn heads!
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T#: 642041 | Part#: 013748LA01
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740.69
SALE: $740.69 (10% OFF)
WAS: $822.99 on 06-14-2026

This product was last offered at the strikethrough price on
06-14-2026

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Turner Motorsport Turner Carbon Fiber Diffuser - G20 M340i / xDrive 013748LA01
Turner Carbon Fiber Diffuser - G20 M340i / xDrive
$740.69

Our Turner G20 M-Sport Carbon Fiber Diffuser is a beautiful upgrade to the rear end of your M340. This diffuser features curvature designed to accentuate the G20 body lines, and is designed and engineered in-house using state of the art 3D laser scanning and CAD technology for precision OE quality fitment. The diffuser mounts to existing bumper insert mounting locations with OE hardware for a simple installation. TMS carbon fiber products are made from lightweight, hand laid epoxy resin pre-impregnated 2x2 twill weave carbon fiber cloth, and autoclave cured. Clear coated for excellent finish durability and UV resistance, and rated to withstand 100°C (212*F) continuous use, and 120°C (248*F) intermittent use.

Features & Specifications:

  • Designed in-house using state of the art 3d laser scanning and CAD technology for precision fitment 
  • Mounts to existing bumper insert mounting locations with OE hardware
  • TMS carbon fiber products are made from lightweight, hand-laid epoxy resin pre-impregnated 2x2 twill weave carbon fiber cloth and autoclave cured
  • Clear coated for excellent finish durability and UV resistance
  • Can be painted for a color-matched look with standard body shop prep work
  • Rated to withstand 100°C (212*F) continuous use, and 120°C (248*F) intermittent use
  • Replaces BMW P/N: 51128069391

Prop 65 WarningProp 65 Warning

Cross Reference
  • 51128069391

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Lifetime Replacement

This Product Is Covered By Our Lifetime Replacement Program

Products protected by our Lifetime Replacement Program are covered for as long as you own the product, no need to worry about an expiration date. Purchase your products and enjoy some worry-free motoring, knowing we've got you covered.

If you have any questions, would like to learn more or are ready to place a replacement claim, click here!

MAKE MODEL SUBMODEL ENGINE Special Fitment Notes
BMW G20 M340i B58 3.0L For Pre-LCI vehicles only (production date up to 07/2022)
BMW G20 M340i xDrive B58 3.0L For Pre-LCI vehicles only (production date up to 07/2022)
*The above product applications have been written by Turner Motorsport. All warranties, product application, fitment, and performance are the responsibility of Turner Motorsport. For additional information see the terms of use.