BMW X4 ECU remapping
139 files available
About remapping
Looking to remap your BMW X4? We have 139 files for the BMW X4, covering 50 engine variants. Remapping optimises the ECU's original map to gain power and torque and sharpen response, keeping reliability and being fully reversible.
The table below shows the BMW X4 engines we have files for, along with the ECUs they use. Drivers can request a quote for their X4; professionals can log in to download the file instantly.
Fuel split
Engines and gains
| Engine | Fuel | Stock | Stage 1 | Stage 2 |
|---|---|---|---|---|
| M40i | Petrol | 354 hp | 400 hp +46 | — |
| 35d | Diesel | 313 hp | 358 hp +45 | 380 hp +67 |
| xDrive 28i | Petrol | 258 hp | 277 hp +19 | — |
| 30i (B48) | Petrol | 252 hp | 308 hp +56 | — |
| 28i | Petrol | 245 hp | 288 hp +43 | — |
| 20d | Diesel | 190 hp | 220 hp +30 | — |
Indicative figures from the technical catalogue; confirmed when you request the file.
Power curve
30i (B48)
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.
Speed limiter removal
Removal of the factory speed limiter.
Stage 2
Remap for vehicles with mechanical upgrades (intake, exhaust, intercooler…).
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.
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
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
How many remap files are there for BMW X4?
We currently have 139 files for BMW X4, ready to download or request. The library grows constantly with new projects.
Which services can be applied to BMW X4?
Depending on the engine: Stage 1 and Stage 2 power tuning, EGR, DPF and AdBlue/SCR off, speed-limiter removal, pops & bangs and DTC delete. Each entry shows exactly what is available.
Is BMW X4 remapping reversible?
Yes. We always keep the original file, so the vehicle can be returned to factory state at any time.
How much power do you gain remapping a BMW X4?
It depends on the engine, but a Stage 1 remap usually adds 15–30% more power and torque, always within the engine's safe limits. We give you the exact figures for your engine when you request a quote.
Does remapping affect fuel economy or reliability on a BMW X4?
A proper remap improves throttle response and can reduce consumption in normal driving. We always work within the engine's limits to keep reliability.
I'm a driver / a workshop — how do I get my BMW X4 file?
Drivers can request a free, no-obligation quote. Workshops and professionals sign up, buy credits and download the optimised file instantly.