BMW F30 3 Series & F32 4 Series
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F3x PLATFORM
142 parts in stock
// 3 & 4 Series, one platform

BMW F30 3 Series & F32 4 Series

Saloon, Touring, coupé, Convertible or Gran coupé - under the skin the F3x cars are one platform. From a 320d daily to a 440i on the B58, the suspension, braking and styling catalogue is shared; engine parts split by engine code below.

Downpipes & exhaustsIntercoolers & coolingIntakes & charge pipesCoilovers & suspensionBrakesECU tuningStyling & aeroWheels & spacers
ChassisF30-F36
EnginesN20 N55 B48 B58 diesels
Production2012 - 2020
LayoutRWD / xDrive
N20/B48320i 328i 330i
2012-2020 2.0 turbo 184-252hp
The four-cylinder volume cars - strong Stage 1 gains and a huge styling catalogue.
N55335i 435i
2012-2016 N55B30 306hp
Single twin-scroll six - shares its tuning recipe with the M135i/M235i.
B58340i 440i
2015-2020 B58B30 326hp
The M140i's engine in a bigger body - same B58 hardware and maps apply.
Diesel318d - 335d
2012-2020 B47 / N57 150-313hp
The 335d xDrive is a torque monster - remaps liberate 60+ lb-ft with economy intact.
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// The platform

One platform, every flavour

The F3x generation is the biggest single platform in our BMW catalogue because it covers so much ground: four bodies, a dozen engines, RWD and xDrive. The good news for owners - chassis, brake and styling parts are shared across nearly all of them, and the two headline petrol engines (N55 and B58) inherit fully proven tuning paths from the 1 and 2 Series cars. Whatever F3x you run, the upgrade map is already drawn.

The proven upgrade path

01
Stage 1
A map suits every engine here - +40-60hp on the fours, +60-90hp on the sixes, big torque on the diesels.
02
Breathing
Downpipe and intake matched to your engine code, with an intercooler upgrade on tuned petrol cars.
03
Chassis
Coilovers or lowering springs plus front camber - the F3x responds dramatically to geometry.
04
Styling
Splitters, diffusers and spoilers per body style - the aero catalogue on this platform is huge.
// In-house ECU tuning
In-house ECU tuning for the B58, N55 & B48
Stage 1-3 and custom mapping for the B58, N55 & B48, all done in-house - the map to match the hardware above.
Explore ECU tuning →

F3x - frequently asked

Do 3 Series and 4 Series parts interchange?

Mostly - F30/F31 and F32/F33/F36 share the platform, so suspension, brakes and drivetrain parts cross over. Exhausts and exterior styling are body-specific and listed as such.

Which engine parts fit my car?

Go by engine code, not badge: N20/B48 fours, N55 or B58 sixes, B47/N57 diesels. Every engine-side listing on this page states its code - the sidebar filter narrows to yours.

Is the 340i/440i really the same engine as the M140i?

Yes - the B58. Downpipes, intercoolers, intakes and maps developed on the M140i apply directly, making the 340i/440i one of the best value tuning bases on sale.

Do you offer ECU tuning in-house?

Yes - Stage 1-3 and custom ECU mapping are done fully in-house. We don't currently offer parts fitting, but we're happy to advise on your install.

// Browse the range

F3x parts by category