The complete kit
Confirm the exact part, number of sections, dimensions and supplied fixings. Do not assume adhesives, brackets or other fitting materials are included from the image.
Rear diffuser
BMW 3 Series G20 / G21 / G28 rear diffuser
BMW · 3 Series · G20 / G21 / G28
Exact specification confirmed before ordering.
A sculpted rear lower section with the openings and contours shown in the product visual.
£499Guide price. One complete part; finish, hardware and mounting confirmed before order.
Your vehicle
G20/G21/G28 rear-bumper layout. Check the bumper version, exhaust openings and mounting points.
Preview this part on your carSee the selected part on your car. Exact dimensions and fitment are checked before ordering.
Your basket is a fitment and pricing request. Nothing is ordered until the exact specification and price are agreed.
THE DETAIL BEHIND THE PARTKnow the version.
Know the version.
Plan the fitting.
Catalogue details narrow the choice. They do not establish physical compatibility with your individual car.
- Vehicle range
- BMW · 3 Series
- Generation
- G20 / G21 / G28
- Body & bumper
- The exact body and bumper version still need confirmation.
- Appearance shown
- Dark carbon-weave appearance
G20/G21/G28 rear-bumper layout. Check the bumper version, exhaust openings and mounting points.
Material & finish
The appearance shown is a visual reference. Confirm the selected version’s written material specification, finish and any preparation needed.
Fitting & care
Have an installer check the mounting method and clearances. Use the instructions and care guidance for the final specification.
Make the detail
part of your car.
Explore the shape and finish, keep your chosen parts in one build, and preview the appearance on a photo of your car.
We confirm the physical specification, finish and supplied contents before ordering.
- The part
- Rear diffuser
- Vehicle range
- BMW · 3 Series · G20 / G21 / G28
- Appearance
- Dark carbon-weave appearance
- Before ordering
- Exact body and bumper match, specification, fixing method and price.
Start with the body and bumper.
A model name is the starting point. The exact generation, body and original trim determine the next check.
- Model generation, production year and body style.
- Original bumper, trim package and existing bodywork changes.
- Clear views of the full mounting area.
- Part dimensions, fixing method and required hardware.
- Clearances and a suitable fitting plan with your installer.
Fit it with care.
Have an experienced installer review the part and fitting area before removing original components. Confirm the mounting method and instructions for the final specification.
Material, finish, supplied hardware and care guidance are checked as part of the quotation.
Ask a product question ↗Keep the whole build together.
Add the part with your vehicle and model generation. We’ll work through the detail and fitment with you.
KEEP EXPLORING
View all →More exterior details.
Rear spoiler
BMW 2 Series / M2 F22 / F87 rear spoiler
A low rear lip to follow the boot-lid edge and define the rear profile.
£169
Side extensions
BMW 3 Series F30 side extensions
Side-sill extensions to carry a lower line between the front and rear wheels.
£299 / pair
Roof spoiler
BMW 3 Series F30 roof spoiler
A shaped upper spoiler to extend the line at the roof and rear-window edge.
£199
Front splitter
BMW 3 Series F30 / F31 / F35 front splitter
A shaped lower front lip to define the bumper line and outer corners.
£89 / kit