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Planted Technology BMW M140i Seat Bracket

From £224.95 Incl. VAT

Planted Technology BMW M140i Seat Bracket by Planted Technology. Brand: Planted Technology. Construction: Steel. Make & model: BMW 1 Series.

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A Planted Technology seat bracket for the BMW M140i. Part number SB139-1.

The M140i is the last of a particular kind of BMW: a small hatchback with a straight six driving the rear wheels. That combination has gone and it is not coming back, which is most of why people are buying and building them now.

A word about part numbers on the small BMWs

We carry several brackets across the F2x and F3x cars under different base numbers, including SB242 and SB120-M2, and this one under SB139-1. Which one your car takes depends on the exact model and year rather than on the family name, so send us the registration and we will tell you. Do not order by comparing the titles.

What it needs

An M140i is quick and it is short. It rotates readily and it rewards a driver who can feel that happening early, which is exactly the situation where sliding in a soft seat costs you. The standard sports seat is better than average and still gives up once a harness goes in.

Side airbags, occupancy sensing and usually powered adjustment. Tell us the specification.

Additional information

Weight 8 kg
Dimensions 50 × 503 × 30 cm
Brand

Construction

Make & model

Product Colour

Sport Seat Position

,

Compatible reclining seats

This bracket is drilled to the bolt pattern used by Recaro, OMP and most of the other major reclining seat brands.

A sliding runner sits between the bracket and the seat and is bought separately. Tell us which seat you are running and we will confirm the right one.

The seats below are a few we know fit. If yours is not on the list, ask us and we will check it.

Compatible bucket seats

This bracket is drilled to the bolt pattern used by Sparco, OMP and most of the other major base mount brands.

A sliding runner sits between the bracket and the seat and is bought separately.

The seats below are a few we know fit. If yours is not on the list, ask us and we will check it.

Compatible classic seats

This bracket is drilled to the bolt pattern used by Sparco, OMP and most of the other major base mount brands.

A sliding runner sits between the bracket and the seat and is bought separately.

The seats below are a few we know fit. If yours is not on the list, ask us and we will check it.

Have you written anything about this exact product?
Yes, we have covered this exact product: Our Top Fixed Competition Bucket Seats For The BMW M140I, and Lexus Planted Technology Frames Updated For 2026. 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 BMW 1 Series. 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.

Availability

Planted brackets are special order from the USA

We bring a batch over roughly every 3 to 5 weeks. Everything in each batch is pre-sold against a customer order, so the sooner your order is in, the sooner it ships.

Need it faster? Ask us before you order. We occasionally hold overstock of the popular models, and we can tell you what is on the shelf.

Special order, so non-returnable once shipped

Once your bracket has shipped from the USA for your order, our non-returnable policy applies. It was bought in for you specifically.

That makes it worth getting right first time. Send us your car and the seat you are fitting and we will confirm the correct bracket before you buy.

Planted Mazda MX5 Bracket

In-store displays:

We have a premium range of over 125 seats from brands including: Bimarco, Cobra, Corbeau, Sparco, OMP, Recaro, GP-Race, and Bride to name just a few brands we work with.  

Alongside this, we also stock and display HANS devices, harnesses, race-wear, race-suits, FIA helmets and various other safety equipment. If you are looking to visit us to see and try any particular seat or product, please contact us in advance and we’ll be happy to help.

In-Store appointments:

Book now!

Due to the specialist nature of our services, we do ask that you please contact us in advance to book an appointment. We have multiple slots available each day including selected availability at the weekend.

Working by appointment allows us to dedicate our time with you and provide a personal and professional service. We’ll always ensure you leave with the right equipment for your needs.

Spread the cost with Klarna

Choose Klarna at checkout and pick the plan that suits you. The options and amounts for this product are shown below, and they update when you choose an option above.

Use the purchase power check in the Klarna box for a quick, no-obligation look at what you could be approved for before you order.

How it works at GSM SportSeats4u

  1. 1Add the product to your basket and go to checkout as normal.
  2. 2Select Klarna as your payment method and choose your plan. Klarna gives you a decision in seconds.
  3. 3We dispatch straight away. You pay Klarna on the schedule you chose, and any refund goes back through Klarna.

Your questions, answered by Klarna

Klarna is available to UK residents aged 18 and over. Subject to status. Terms and conditions and late fees apply. Klarna Financial Services UK Limited is authorised and regulated by the Financial Conduct Authority. Full details at klarna.com/uk. Every way you can pay with us is on our payment and finance page, or call 0115 989 3488 and we will talk it through.

Fast delivery lead times:

If you require fast delivery, please contact us in advance of ordering and we’ll happily check stock allocation and availability for you. We carry a large amount of stock at our showroom and across multiple distribution hubs. This allows us to provide immediate dispatch across a huge number of brands from Corbeau and Cobra through to Sparco and OMP. (Does not apply to all items)

Due to the niche market we work in, some products are custom hand made to order, or special order from manufacturers like PCI Racing and Planted Technology. If you want to know how fast a product will be dispatched. Simply drop us a message through our Contact us form.

ParcelForce

Addtional lead time notes:

Quick dispatch: Stocked products are dispatched within 24-48 hours with Parcel Force.
Sparco roll cages: We can only deliver these to a registered (LTD) company address.
In-store collection: Please contact us in advance to book an in-store collection appointment.

Guides and advice

GuideOur Top Fixed Competition Bucket Seats For The BMW M140I
GuideLexus Planted Technology Frames Updated For 2026
GuideThe complete guide to universal seat sliding runners
GuideBase Mount Or Side Mount? The Bucket Seat Fitting Stack Explained

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