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 F30 Saloon and F31 Touring ran the N20 from 2012 through end of F30 production, the same turbocharged 2.0-litre four used across the N20 family in five different chassis. Stock output is 245 bhp / 350 Nm, rear-wheel drive through the ZF 8HP. Both body styles share the same platform, drivetrain and ECU — the Touring adds mass but nothing that changes the N20's ceiling. Stage 1 on the 328i is among the most cost-effective single modifications in the BMW range: 280 bhp / 400 Nm from the OEM hardware, no new parts required. Stage 2 adds downpipe, intake and intercooler for 320 bhp / 450 Nm; beyond that, a hybrid or big-turbo build takes the N20 to around 400 bhp on the right hardware spec.
The F30 328i is the N20 3 Series in Saloon form; the F31 adds a Touring body on the same platform. Both variants run identical hardware, and Samuel maps them to the same specification — Stage 1 at 280 bhp · 400 Nm via OBD on BM3, MHD or MG Flasher, every file built for the specific car, its fuel grade and installed hardware. Stage 2 targets 320 bhp · 450 Nm with a downpipe, intake and intercooler; Stage 3 is bespoke around whatever hybrid turbo setup you submit. The map 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
328i N20 tuning on the F30 / F31: this engine in the saloon and Touring
The N20 in the 328i is the same 2.0-litre single-turbo four fitted to the F32 428i, F10 528i and F25 X3 28i — same block, same MEVD17.2 DME, same stage targets. The F30's executive weight and ZF 8HP gearbox are the chassis variables Samuel accounts for in the calibration. Stage 1 delivers 280 bhp / 400 Nm from the OEM turbo and fuel system; Stage 2 adds the airflow upgrades for 320 bhp / 450 Nm; every map is log-reviewed after the first flash before sign-off.
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
This 328i tune runs on Bootmod3, MHD or MG Flasher — all three flash the N20 over OBD. Compare platforms or see full N20 compatibility.
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
This page covers the F30 Saloon and F31 Touring (2012–2019). Both run the N20 2.0L turbocharged inline-four and share the same core calibration — every tune Samuel delivers is tailored to your specific car, fuel grade and installed hardware, not a base file.
A factory warranty can be voided if BMW links a failure to the tune — that's a personal decision to weigh. Samuel's 328i maps stay within the N20's mechanical limits and are fully reversible to stock before any dealer visit. Many owners run a tuned 328i without incident.
BM3 is the most established for N20 tuning, with realtime monitoring through the app. MHD covers Stage 1 and Stage 2 on the 328i with a solid data-logging toolset. MG Flasher is a clean alternative for owners already in that ecosystem. The map you receive is the same regardless of platform; the choice is about which flashing tool you prefer.
The F30 328i runs the ZF 8HP automatic; xHP calibration is worthwhile once torque increases at Stage 2 and above, where the shift points and torque limits benefit from matching the ECU map. At Stage 1 it is optional but noticeable. Manual-gearbox variants don't need it.
Yes — after your first drive on the new map, send data logs back through BM3, MHD or MG Flasher and Samuel reviews them before sign-off. If anything needs adjusting for your fuel grade or hardware, the file is revised. That's what makes this a hand-calibrated tune rather than a file sent and closed.
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