A Planted Technology seat bracket for the Mini Cooper hatchback, third generation on the F55, F56 and F57 chassis, 2014 onwards. Part number SB387.
Three chassis codes: F55 five door, F56 three door and F57 convertible. The earlier R50, R53 and R56 cars take SB094.
It is a BMW platform now
The F56 moved the Mini onto BMW’s UKL front wheel drive architecture, shared with the 2 Series Active Tourer. It is a bigger, heavier car than the R53 that made the modern Mini’s reputation, and it is considerably more refined.
The JCW and GP
The John Cooper Works cars are the ones tracked, and the GP is a two seater with a cage behind you from the factory. If yours is a GP, tell us, because the rear structure changes what you are working with and the factory seats are worth keeping.
Space
Better than the R53 but the door cards still come in close and the roof is low. Tell us your height and build before you order.
Side airbags and occupancy sensing. Handed, so order twice for a pair.
Have you written anything about this exact product?
Yes, we have covered this exact product: Lexus Planted Technology Frames Updated For 2026, and Customer Car: Subaru Impreza With Corbeau RRS Seats and Planted Technology Brackets. That is first-hand coverage from our own builds and showroom, not brochure copy.
Will this fit my car?
This frame is made for the Mini Cooper Hatchback (3rd Generation). Chassis code and years matter more than the badge, as floor pans change between generations, so if your car sits near a changeover year, send us the registration and we will confirm before you order.
Which seats does it take?
Check the bolt pattern in the specification against your seat. The Compatible seats tab above lists what bolts straight on. If your seat is not listed, tell us what you run and we will confirm the fit.
Do I keep fore-and-aft adjustment?
Only with a sliding runner between the frame and the seat, which is a separate part on Planted frames. If more than one person drives the car, budget for the runner. Our guide to sliding runners explains the options and widths.
Is this for the driver or passenger side?
Both sides are available on this listing, pick driver or passenger side at the point of order (sides listed are for right-hand-drive cars). Left-hand-drive car? Ask us, as the sides swap over and availability varies by model.