A Planted Technology seat bracket for the Mazdaspeed 3. Part number SB183.
In this country that car is the Mazda 3 MPS. Same car, different badge, and if you have an MPS this is your bracket. Send us the registration and we will confirm it.
Send us the year as well
This listing does not carry one, and Mazda built the MPS across two generations, the BK and the BL, which do not share a floor. We are adding the year data to the listing. In the meantime a registration takes us a minute and saves you ordering the wrong part.
Why the seat matters on this car in particular
The MPS puts a great deal of torque through the front wheels and it is famous for what that does to the steering. A driver who is bracing against the seat with their arms is not steering the car cleanly, and on a car that already fights you under power that costs real time. Being held in place by the seat rather than by the wheel is the whole point.
Related
The Mazdaspeed 6, which is the 6 MPS here, takes SB327.
Tell us about side airbags in the factory seats before anything comes out.
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 Mazdaspeed 3. 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.
