Tuning · BMW 328i (F30 / F31)
328i
N20
The N20 in the F30 328i saloon and F31 Touring, the volume executive 3-series with the 2.0L turbo four. Hand-calibrated from Stage 1 through to a hybrid-turbo build.
Engine
N20
Stock
245 bhp · 350 Nm
Stage 3 ceiling
245 bhp
About this tune
The F30 / F31 328i (2012-2015) is the volume four-cylinder 3 Series, N20 2.0-litre turbocharged inline-four in F30 saloon and F31 Touring form. Stock is 245 bhp / 350 Nm, sent through the ZF 8HP. The biggest-selling F30 enthusiast trim worldwide; the N20 underneath is well understood by every major flashing platform.
BMW 328i tuning
The BMW 328i (F30 / F31, 2012–2019) runs the N20 2.0L turbocharged inline-four and leaves the factory at 245 bhp · 350 Nm, Rear-wheel drive, 8-speed ZF automatic. Samuel tunes the F30 Saloon and F31 Touring to the same standard — every map hand-calibrated for the specific car, its fuel grade and its installed hardware, not a base file loaded and left. 328i Stage 1 alone takes it from 245 bhp · 350 Nm to 280 bhp · 400 Nm on the standard turbo, flashed over OBD on BM3, MHD or MG Flasher.
Add the Stage 2 hardware and the 328i targets 320 bhp · 450 Nm; from there the N20 stretches to around 400 bhp on a hybrid or big-turbo build with supporting fuelling. Whichever stage suits the 328i, the file is delivered within 24 hours and is fully reversible to the supplied stock calibration.
Configurator
Build your 328i tune
Choose your stage — Stage 1, Stage 2 or Stage 3 — add the options that fit your car, and send the full build to Samuel for a custom remote remap. He'll quote, schedule, and personally calibrate within 24 hours of confirmation.
Add a stage or add-on
£0
Engine guide
BMW 328i tuning, stages, hardware and what to expect from the F30 N20
The F30 / F31 328i (2012-2015) is the volume four-cylinder 3 Series, N20 2.0-litre turbocharged inline-four in F30 saloon and F31 Touring form. From the factory, BMW set the 328i at 245 bhp / 350 Nm; the N20 hardware ceiling sits considerably higher and is shared across every chassis in the family. BMW 328i tuning with Samuel applies the same N20 Stage 1 / Stage 2 / Stage 3 map family. BMW 328i F30 tuning and BMW 328i F31 tuning use the same map, same drivetrain, same calibration.
Stage 1
280 bhp · 400 Nm
No hardware required. The MEVD17 DME is flashed via the OBD port. BMW 328i Stage 1 unlocks 280 bhp and 400 Nm from the OEM hardware (up from 245 / 350 stock). The BMW 328i chip tuning starting point and the most popular single modification on the F30 / F31 N20 platform.
Every 328i tune Samuel produces is calibrated individually for the specific car, fuel grade and installed hardware, not a base map loaded and left. BMW 328i tuning done correctly accounts for the F30 / F31 chassis weight, the 8HP gearbox calibration and UK fuel quality; the map is reviewed against your data logs after the first flash and revised before sign-off.
Compatibility
Platform and hardware compatibility
Bootmod3 (BM3)
Full N20 support across every chassis in the family (228i, 125i, 328i, 428i, 528i, X3 28i, Z4 28i). MEVD17 DME OBD flashing, realtime monitoring via the BM3 app. The most widely used platform for N20 tuning.
Read more →
MHD
Full N20 support. Suitable for Stage 1 and Stage 2. Strong data-logging toolset.
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MG Flasher
Full N20 support. Clean interface and reliable flash process on the MEVD17 DME.
Read more →
xHP Flashtool
Compatible with the ZF 8HP gearbox fitted to F-series N20 cars (228i, 125i, 328i, 428i, 528i, X3 28i F25). Strongly recommended at Stage 2 where torque jumps significantly for a 2.0-litre four. The Z4 28i E89 uses an older ZF 6HP or 7-speed DCT, xHP coverage differs.
Read more →
ECU: MEVD17.2 DME across N20 production. Accessible via OBD port for Stage 1 and Stage 2.
328i specs & stage targets
BMW 328i tuning at a glance
- Engine
- N20 · 2.0L turbocharged inline-four
- Body styles
- F30 Saloon · F31 Touring
- Chassis codes
- F30 / F31
- Production
- 2012–2019
- Drivetrain
- Rear-wheel drive
- Gearbox
- 8-speed ZF automatic
- Stock output
- 245 bhp · 350 Nm
- Tuning ceiling
- ~400 bhp on the right hardware
| Stage | Target |
|---|---|
| Stage 1 | 280 bhp · 400 Nm |
| Stage 2 | 320 bhp · 450 Nm |
| Stage 3, Hybrid Turbo | 400 bhp · 500 Nm (depending on spec) |
FAQ
328i tuning — frequently asked questions
328i Stage 1 lifts the N20 from a stock 245 bhp · 350 Nm to 280 bhp · 400 Nm, with no hardware required. The map is flashed through the OBD port on BM3, MHD or MG Flasher and is the starting point for almost every 328i owner — broader torque and sharper throttle response from the factory hardware.
This page covers the F30 Saloon and F31 Touring (F30 / F31). They share the N20 2.0L turbocharged inline-four and run the same core calibration, but every 328i tune Samuel delivers is tailored to your exact car, fuel grade and installed hardware — never a base map loaded and left.
Stage 2 on the 328i targets 320 bhp · 450 Nm and needs downpipe + intake + intercooler. Everything else — turbo, fuel system, intercooler — holds within the Stage 2 figures on the N20.
On the right hardware spec the N20 in the 328i reaches around 400 bhp. Stage 1 and Stage 2 run the standard turbo; beyond that needs a hybrid or full big-turbo conversion with supporting fuelling, and the calibration is built bespoke per car.
Remotely. Once Samuel has your build details, the calibrated 328i map is delivered to your flashing tool account (BM3, MHD or MG Flasher) within 24 hours and you flash it yourself over OBD in about 15 minutes. It's fully reversible — the original N20 stock file is supplied before you flash, so the car can return to factory at any time.
A factory warranty can be voided if BMW shows a tune caused a specific failure, so it's a personal call. Samuel's 328i maps are calibrated to stay within the mechanical limits of the N20 hardware, and because the tune is reversible to stock before any dealer visit, many owners run a tuned 328i without issue.
Keep exploring
Keep exploring 328i tuning
Other N20 models we tune: 125i, 228i, 428i, 528i, X3 28i, Z4 28i.
Engine guide
N20 tuning
Every N20 BMW we calibrate, with the full Stage 1, 2 and 3 breakdown for the engine.
Learn moreStages
Stage 1 & Stage 2 explained
What separates Stage 1 from Stage 2 on the 328i, the real-world gains and the hardware each one needs.
Learn morePricing
How tuning is priced
How the licence, off-the-shelf maps and custom calibration are priced. We quote your exact spec, never a fixed menu.
Learn moreGuide
What is bootmod3?
New to remote flashing? A plain-English explainer on the platform and how a custom map reaches your car.
Learn more