BMW F90 M5 LCI Rear Diffusers
3 products
Your F90 M5 rear diffuser has to match the rear bumper BMW restyled for the 2021 facelift.
For a 2021–2023 LCI, the CS-style and 3D-style diffusers are the ones made for that bumper. The CS style is finished in high-gloss carbon; the 3D style comes in three pieces and replaces the factory diffuser. A 3-piece diffuser with rear splitters also appears here: it is named for 2018–2020 cars, though its description says it fits the LCI as well.
BMW F90 M5 LCI Rear Diffusers buying guide
F90 M5 rear diffuser for an LCI: CS or 3D style
The CS-style diffuser takes its look from the M5 CS, the limited, lighter model BMW built on the updated car with a carbon fiber rear diffuser. Ours is an aftermarket part in real carbon fiber with a high-gloss finish, not the BMW component. Its listing doesn't describe the mounting, so ask us before you book the fitting.
The 3D-style diffuser is a three-piece design in 2x2 weave carbon with a deep gloss clear coat and a UV-resistant coating. It goes on in place of the factory diffuser, and the rear bumper has to come off to fit it, so this is a job for a shop. Its listing names both the M5 and the M5 Competition.
The 3-piece diffuser with rear splitters
This one was made for the 2018–2020 M5, and its description adds that it will also fit the LCI. It comes with pre-drilled holes and self-tapping screws, and drilling is required, so a professional fit is strongly advised. Because BMW changed the rear bumper at the facelift, text a photo of yours to 609-525-4865 before ordering it for a 2021–2023 car. On a pre-LCI M5 it is the diffuser made for your bumper.
Test-fit any diffuser before you drill or paint: drilled or installed parts can't be returned. If a diffuser doesn't fit the car named on its product page, contact us before installing and our fitment guarantee covers return shipping. For the front of the car, see the F90 M5 LCI front lips, or browse every part on the F90 M5 LCI page.
Frequently asked questions
Is the CS-style diffuser the part BMW fitted to the M5 CS?
No. BMW gave the M5 CS a carbon fiber rear diffuser from the factory, along with a carbon front splitter, mirror caps and rear spoiler. Our CS-style diffuser follows that look as an aftermarket part in real carbon fiber with a high-gloss finish, and it is listed for LCI cars.
Which of these F90 diffusers needs drilling?
The 3-piece diffuser with rear splitters: its listing says drilling is required and supplies self-tapping screws for the pre-drilled holes. The 3D-style diffuser replaces the factory one with the rear bumper removed, and its listing doesn't mention drilling. The CS-style listing gives no method, so ask us.
Which diffuser suits a pre-LCI F90 M5?
The 3-piece diffuser with rear splitters, which was made for 2018–2020 cars. The CS-style and 3D-style diffusers are listed for the LCI only, so ask us before trying either on an earlier car. A photo of your rear bumper sent to 609-525-4865 settles it.