BMW Serie 3 ECU remapping
11,941 files available
About remapping
The BMW 3 Series is by far the most remapped model in our catalogue: 11,941 files covering everything from the ubiquitous 320d and 318d to the petrol 320i, 330d and 335i, across several generations (E90/E91, F30/F31 and later). Its sporting character and turbocharged engines, both diesel and petrol, respond particularly well to ECU remapping.
On a diesel 3 Series, a Stage 1 map typically delivers noticeably fuller mid-range pull and a more immediate throttle response, while preserving the reliability of the engine. On the turbocharged petrol versions such as the 320i, 328i and 335i, the margin for improvement is even more evident. We work on the most common ECUs for this model — EDC16C31, EDC17C41, EDC17C56 and EDC17CP02 — always starting from the original file and fully reversibly.
Model highlights
- ›9,907 Stage 1 files available: by a wide margin the most requested service for the 3 Series.
- ›Extensive diesel coverage (320d, 318d, 330d, 316d) and turbocharged petrol (320i, 335i).
- ›1,488 Stage 2 files and 1,254 speed limiter removals for this model.
- ›Bosch EDC16 and EDC17 ECUs comprehensively covered.
Fuel split
Engines and gains
| Engine | Fuel | Stock | Stage 1 | Stage 2 |
|---|---|---|---|---|
| M3 E90 | Petrol | 420 hp | 441 hp +21 | — |
| M3 E46 | Petrol | 343 hp | 360 hp +17 | — |
| M3 E36 3.2 | Petrol | 321 hp | 340 hp +19 | — |
| 35i N54 | Petrol | 306 hp | 365 hp +59 | 385 hp +79 |
| M3 E36 3.0 | Petrol | 286 hp | 304 hp +18 | — |
| 335d E90 | Diesel | 286 hp | 320 hp +34 | 338 hp +52 |
| 330i E90 (EU4) | Petrol | 272 hp | 290 hp +18 | — |
| 330i E90 | Petrol | 272 hp | 282 hp +10 | — |
| 30i (B48) | Petrol | 258 hp | 308 hp +50 | — |
| 330D E90 | Diesel | 245 hp | 300 hp +55 | — |
| 328i E90 | Petrol | 234 hp | 254 hp +20 | — |
| 330i E46 | Petrol | 231 hp | 245 hp +14 | — |
| 325i E90 (3.0) | Petrol | 218 hp | 234 hp +16 | 265 hp +47 |
| 325i E90 (2.5) | Petrol | 218 hp | 235 hp +17 | — |
| 325d | Diesel | 218 hp | 258 hp +40 | — |
| 325d E90 | Diesel | 204 hp | 287 hp +83 | — |
| 330d E46 | Diesel | 204 hp | 237 hp +33 | — |
| M3 E30 | Petrol | 194 hp | 210 hp +16 | — |
| 328i E46 | Petrol | 193 hp | 210 hp +17 | — |
| 328i E36 | Petrol | 193 hp | 205 hp +12 | — |
Indicative figures from the technical catalogue; confirmed when you request the file.
Power curve
323i E36
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.
EGR off
EGR valve management to reduce soot issues and improve response.
Stage 2
Remap for vehicles with mechanical upgrades (intake, exhaust, intercooler…).
Speed limiter removal
Removal of the factory speed limiter.
DPF off
Particulate filter solution: no more regenerations or blockage warnings.
Pops & bangs
Pops & bangs exhaust effect (on lift-off and gear changes).
DTC delete
Clearing of fault codes (DTC) that can't be removed via diagnosis.
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?
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Log in as a professionalFrequently asked questions
How much difference does Stage 1 make on a 320d?
The most obvious change is mid-range torque: the car pulls harder without needing to drop a gear and feels more flexible when overtaking. The exact figures depend on the variant and the condition of the engine, so we confirm them against the specific file.
Which ECUs do you cover for the 3 Series?
The most frequent in our catalogue are the Bosch EDC16C31, EDC16C35, EDC17C41, EDC17C56, EDC17C50 and EDC17CP02. If your unit carries a different reference, ask us first and we will check availability.
Is the remap reversible?
Yes. We always save the original file before modifying anything, so the ECU can be returned to its factory state whenever you want.