BMW Serie 4 ECU remapping
848 files available
About remapping
The BMW 4 Series accounts for 848 files in our catalogue, with a genuinely mixed range: the 420i and 420d as the volume sellers, alongside the 435i, 440i, 428i and the M4 at the top. It is a coupe and convertible line with real performance intent.
Stage 1 makes up 648 files, with 168 Stage 2 — a high proportion reflecting the sportier end of the range — and 110 speed limiter removals. The ECUs include MG1CS003, MEVD17.2G, MEVD17.2.9 and MEVD17.2P on the petrol units, plus EDC17C50 and EDC17C56 on the diesels.
Model highlights
- ›648 Stage 1 files across the petrol and diesel range.
- ›168 Stage 2 files, reflecting the sportier end of the line-up.
- ›Coverage of the M4 alongside the mainstream versions.
- ›ECUs including MG1CS003, MEVD17.2G, MEVD17.2P, EDC17C50 and EDC17C56.
Fuel split
Engines and gains
| Engine | Fuel | Stock | Stage 1 | Stage 2 |
|---|---|---|---|---|
| M40i | Petrol | 374 hp | 420 hp +46 | — |
| 40i | Petrol | 326 hp | 400 hp +74 | — |
| 30d | Other | 286 hp | 330 hp +44 | — |
| 30d M Performance | Diesel | 286 hp | 305 hp +19 | — |
| 30i (B48) | Petrol | 230 hp | 310 hp +80 | — |
| 20d MHEV | Other | 190 hp | 220 hp +30 | — |
| 20i | Petrol | 184 hp | 255 hp +71 | — |
Indicative figures from the technical catalogue; confirmed when you request the file.
Power curve
30d M Performance
ECUs
Generations covered
ECU manufacturers
Available services
Remapping services
Stage 1
Optimising the original map with no hardware changes: more power and torque, full reliability.
Stage 2
Remap for vehicles with mechanical upgrades (intake, exhaust, intercooler…).
Speed limiter removal
Removal of the factory speed limiter.
EGR off
EGR valve management to reduce soot issues and improve response.
Pops & bangs
Pops & bangs exhaust effect (on lift-off and gear changes).
DPF off
Particulate filter solution: no more regenerations or blockage warnings.
AdBlue/SCR off
AdBlue/SCR system management to avoid faults and lock-outs.
Stage 3
Setup for high-performance modifications on specific hardware.
Why remap with Repromatronic
- ✓More power and torque with engine-safe tuning
- ✓Sharper throttle response and nicer driving
- ✓Potential fuel savings in normal driving
- ✓Files built from the original and 100% reversible
- ✓Made by technicians with thousands of projects behind them
Are you a driver?
Request a free quote for your vehicle and we'll tell you the gains you can expect.
Request a quoteAre you a workshop or professional?
Sign up, buy credits and download the optimised file instantly.
Log in as a professionalFrequently asked questions
Do you work on the M4?
Yes, it is present in our catalogue and accounts for part of the Stage 2 work on this model.
Which engine gains most?
The turbocharged petrol units — 435i, 440i and the M4 — show the largest gains in outright figures, while the 420d excels at everyday torque.
What is Stage 2?
It assumes mechanical modifications such as intake or exhaust. If your car is standard, Stage 1 is what applies to you.