BMW 3 Series (F3X) 2012-2015 328i (N20) 241bhp remap figures
Thinking of remapping a BMW 3 Series 328i (N20) 241bhp? The standard car makes 241bhp and 350Nm; with a Stage 1 remap from our Leicester workshop we expect around 285bhp and 398Nm, up to +44bhp and +48Nm.
Choose your map
Stage 1 remap figures
A Stage 1 remap is a software-only change to the ECU on an otherwise standard car. It needs no extra parts, which makes it the usual starting point.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 241 bhp | 285 bhp | +44 bhp |
| Torque | 350 Nm | 398 Nm | +48 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 241 bhp | 350 Nm | |
| Stage 1Maximum software-only performance | 285 bhp | 398 Nm | +44 bhp +48 Nm |
| Stage 1 EcoPerformance with economy in mind | 274 bhp | 394 Nm | +33 bhp +44 Nm |
| Eco mapEconomy first | 270 bhp | 392 Nm | +29 bhp +42 Nm |
Who is the Stage 1 map for?
- Drivers who want a sharper throttle and a small, honest gain from software alone.
- Owners who would rather keep the car standard in every other way.
- Anyone who wants the fullest software-only map for this engine, accepting that the gain is modest without a turbocharger.
What this means for your 3 Series
Without a turbocharger the improvement comes from ignition, fuelling and throttle mapping rather than boost, so expect a smaller but still noticeable change in response.
Engine management is by a Bosch MEVD17.2.9 unit. We read the ECU on your car and compare it with the software listed here before any work starts, so you know what to expect before you commit.
We remap at our Belgrave Gate workshop in Leicester, or at your home or work within 30 miles, and every job starts with a diagnostic check.
Please note: these are expected figures, not guarantees. Real results vary with the condition of the vehicle, the ECU software version, fuel quality and the hardware fitted. Some options - including Stage 2 and anything that needs extra hardware - are for off-road or competition use only. We check every vehicle first and confirm what is achievable before any work starts.
Figures reviewed 22 October 2026.
Stage 1 questions
How much power does the Stage 1 map give the BMW 3 Series 328i (N20) 241bhp?
We expect 285bhp and 398Nm against 241bhp and 350Nm as standard: up to +44bhp and +48Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
Does a Stage 1 remap need any extra parts on the BMW 3 Series 328i (N20) 241bhp?
No. Stage 1 is a software-only change to the ECU on an otherwise standard car.
Is there a gentler map than Stage 1 for this engine?
Yes, two. Stage 1 Eco is performance with economy in mind: 274bhp and 394Nm expected. The Eco map is economy first: 270bhp and 392Nm. Both still sit above the standard 241bhp and 350Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
More BMW 3 Series figures
Other petrol variants
- 330i (B48) 248bhp 2015>
- 330e (B48B20A) 252bhp 2015>
- 320i (B48) 181bhp 2015>
- 335i 301bhp 2012>
- 320i (1.6) 167bhp 2012>
- 340i 322bhp 2017>
- 3.0 ActiveHybrid 335bhp 2012>
- 318i (1.5) 134bhp 2015>
- 316i 134bhp 2012>
- M3 424bhp 2014>
All petrol 3 Series (F3X) variants · 3 Series (F3X) 2012-2019 overview · All BMW figures