BMW Z4 ECU remapping
413 files available
About remapping
The BMW Z4 accounts for 413 files in our catalogue, entirely petrol: the 2.0i and 3.0i naturally aspirated and turbocharged units, the 35i and the more recent M40i. It is a compact roadster with a strong focus on driving pleasure rather than practicality.
Stage 1 makes up 344 files, with 64 Stage 2 and 22 speed limiter removals. The ECU range spans MS45, MSV70 and MSD81 on earlier cars through to MEVD17.2.9, MEVD17.2X and the more recent MG1CS201.
Model highlights
- ›344 Stage 1 files across the petrol range.
- ›Coverage of the 35i and the more recent M40i turbo versions.
- ›64 Stage 2 files for cars with hardware modifications.
- ›ECUs from MS45, MSV70 and MSD81 through to MEVD17.2.9 and MG1CS201.
Fuel split
Engines and gains
| Engine | Fuel | Stock | Stage 1 | Stage 2 |
|---|---|---|---|---|
| Z4M E85 | Petrol | 343 hp | 361 hp +18 | — |
| M40i | Petrol | 340 hp | 398 hp +58 | 418 hp +78 |
| sDrive35is E89 | Petrol | 340 hp | 380 hp +40 | — |
| sDrive 35i E89 | Petrol | 306 hp | 370 hp +64 | — |
| 3.0si E85 | Petrol | 265 hp | 286 hp +21 | — |
| 30i | Petrol | 258 hp | 310 hp +52 | — |
| sDrive30i E89 | Petrol | 258 hp | 274 hp +16 | — |
| 3.0i E85 | Petrol | 231 hp | 245 hp +14 | — |
| 2.5si E85 | Petrol | 218 hp | 234 hp +16 | — |
| 23i | Petrol | 204 hp | 224 hp +20 | — |
| 20i | Petrol | 197 hp | 248 hp +51 | — |
| 2.5i E85 | Petrol | 192 hp | 210 hp +18 | — |
| 20i (N20) | Petrol | 184 hp | 256 hp +72 | 275 hp +91 |
| 2.2i E85 | Petrol | 170 hp | 186 hp +16 | — |
| 2.0i E85 | Petrol | 150 hp | 170 hp +20 | — |
Indicative figures from the technical catalogue; confirmed when you request the file.
Power curve
3.0i E85
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.
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.
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
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Log in as a professionalFrequently asked questions
Which Z4 engine gains most?
The turbocharged units — 35i and M40i — deliver clearly more than the naturally aspirated engines, where gains are felt more in response than in figures.
Do you cover the older generations?
Yes, the catalogue spans ECUs from MS45 and MSV70 on the earliest cars through to the modern MG1CS201.
What is Stage 2?
It assumes mechanical modifications such as intake or exhaust. If your car is standard, Stage 1 is what applies.