BMW G20/G21 M340i (Pre-LCI) Dry Carbon Rear Diffuser + F1-Style Third Brake Light

Give your rear end the “factory race car” look — without going full bodykit. This dry carbon rear diffuser is designed for BMW G-Series 340 (M340i) Pre-LCI models, featuring aggressive fins, a clean OEM+ profile, and an integrated F1-style third brake light for that motorsport finish.

Highlights

Dry carbon fibre construction for a premium, lightweight upgrade

Aggressive fin design to modernise the rear and add depth

Integrated third brake light (F1-style) for a sharper, more performance-focused look

Gloss carbon weave finish that pops under light and looks insane in photos

What’s included

1x Dry carbon rear diffuser (as pictured)

1x Integrated third brake light unit (pre-installed in diffuser)

Vehicle fitment (Pre-LCI only)

BMW: 3 Series G20 Saloon / G21 Touring – M340i (Pre-LCI) (typically 2019–2022)

Important notes (please read)

Pre-LCI fitment: This diffuser is intended for pre-facelift (Pre-LCI) bumpers only.

Bumper style matters: Fitment depends on your rear bumper spec (e.g., M Sport / M340i style). If you’re unsure, message us with a photo of your rear bumper and we’ll confirm.

Brake light wiring: The third brake light will require wiring into your existing brake light circuit. Professional installation is recommended.

As with all carbon parts, minor adjustment may be required for perfect panel alignment.