A Planted Technology seat bracket for the BMW 5 Series on the E28 chassis, 1981 to 1988. Part number SB334.
The shark nose 5 Series. The E34 that followed takes SB288.
The first M5
BMW Motorsport built the E28 M5 largely by hand, dropping the M1’s straight six into a plain looking saloon. It was the fastest production saloon in the world when it launched and it created the category everything since has competed in.
Values are serious and originality counts. The M535i is the more attainable version and is a fine car in its own right.
Which decides the approach
The bracket picks up the factory mounting points so nothing is cut. E28 interior parts, particularly the sports seats, are worth money on their own and are getting hard to find. Store them and label the fixings.
Practical
E28s rust round the floors and the seams. Get the carpet up and look properly before you spend anything.
A period trimmed shell suits an E28 better than a modern carbon bucket.
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 BMW 5 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.