Rear Diffuser for BMW 3 Series G20 (2019+)

Clear BMW chassis

Adding a more aggressive rear diffuser to your BMW can offer some performance benefits, but is primarily an aesthetic upgrade. BMWs naturally look great from the rear, why not make yours look even better?

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M Performance Style Glossy Black Diffuser - G20 M340

For Pre-LCI vehicles only (production date up to 07/2022)

For M-Sport Bumpers Only

T#:5872726

Part#: G20PDIFF340GB

Ships in 5 Business Days

$ 250.99 USD

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$ 250.99 USD

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M-Performance inspired glossy black plastic diffuser for G20 M-Sport. Direct bolt-on, no modification required.

M Performance Style Glossy Black Diffuser - 330i incl. xDrive ...

For Vehicles with M Sport bumper only

T#:6212247

Part#: G20PDIFF330-GB

Ships in 5 Business Days

$ 150.00 USD

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$ 150.00 USD

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M-Performance inspired glossy black plastic diffuser for G20 M-Sport. Direct bolt-on, no modification required.

ADRO Carbon Fiber Rear Diffuser - BMW G20 M340 LCI

For 2023+ LCI models

T#:54852018

Part#: A14A70-1302

Ships on Oct 30, 2026

$ 1,355.00 USD

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$ 1,355.00 USD

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The ADRO BMW G20 M340i LCI Rear Diffuser introduces a more sculpted and sophisticated presence to the rear of the vehicle. Crafted from premium carbon fiber and hand finished with exceptional attention to detail, its original 3-piece construction creates a layered, tailored look that enhances the rear profile with greater depth and definition. The result is a subtle yet striking statement that feels both refined and unmistakably purposeful.

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M Performance Style Matte Black Diffuser - 330i incl. xDrive ...

For Vehicles with M Sport bumper only

T#:6212248

Part#: G20PDIFF330-MB

Ships in 5 Business Days

$ 125.00 USD

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$ 125.00 USD

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M-Performance inspired matte black plastic diffuser for G20 M-Sport. Direct bolt-on, no modification required.

Autotecknic Dry Carbon Extended-Fin Competition Rear Diffuser - G20 3...

For Pre-LCI vehicles only (production date up to 07/2022)

Requires M-Performance Rear Valence

T#:21275575

Part#: ATK-BM-0353

Ships in 7 Business Days

$ 500.00 USD

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$ 500.00 USD

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Carbon fiber is a staple in the performance world and has been incorporated into motorsports since the early 80s. Over time companies have taken it upon themselves to create new carbon products to add to your car that may have not been originally available. Autotecknic is no different. If you're looking for a carbon addition that has been made to the highest standards with premium materials, then Autotecknic's line of carbon additions is your one-stop shop. Add some carbon to your M-Performance rear valance! Dry carbon fiber's name comes from its manufacturing process. Dry carbon fiber is formed by using a "pre-preg" or impregnated piece of carbon materials. This piece of carbon is first placed into a mold and then into a sealed autoclave to cure properly. This method creates the least amount of waste and forms a lighter version of carbon than the “wet” method. The autoclave vacuuming process of making dry carbon means fewer pinholes and virtually no air pockets in the carbon. Dry carbon is the highest-quality version of carbon fiber products that are produced.

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ADRO G20 M340i LCI Carbon Rear Winglet Set

For LCI M-Sport Models Only!

T#:27605446

Part#: A14A70-1301

Ships in 3 Business Days

$ 650.00 USD

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$ 650.00 USD

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The 2023+ BMW G20 M340i LCI Rear Winglet offers an aggressive aesthetic to complete the rear-end of the vehicle. Crafted from premium carbon fiber, this original design is hand-made and offers the best in the market, making it the perfect choice for BMW fans.

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