Considering an ECU remap for your BMW X4 M40d 340hp? A Stage 1 remap can take this G02 - 2018 -> diesel mhev engine from 340 BHP to 380 BHP and from 700 Nm to 750 Nm of torque (naturally aspirated). This engine scores 3.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your BMW X4 can achieve.
The BMW X4 M40d 340hp is a 3.0L naturally aspirated diesel mhev engine producing 340 BHP and 700 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 380 BHP and 750 Nm — a gain of around 40 BHP (12%) and 50 Nm (7%).
This engine has limited remap suitability, with gains weighted towards peak power — the improvement is most noticeable at higher RPM. The tuning headroom is classified as limited, based on the percentage gain available from the factory output.
From a technical perspective, the transmission is many variants use zf 8-speed automatic (where fitted); manuals also exist. at this torque level, transmission and driveline servicing history becomes especially important..
Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.. High tuned torque: check transmission torque capacity and service history.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.
| Engine | BHP | Gain | Torque | Gain | Score |
|---|---|---|---|---|---|
| xDrive20i 184hp | 184 → 250 | +66 | 290 → 440 | +150 | Good (6.5/10) |
| xDrive20d 190hp | 190 → 220 | +30 | 400 → 450 | +50 | Good (6.5/10) |
| xDrive25d 231hp | 231 → 270 | +39 | 500 → 550 | +50 | Good (6.5/10) |
| xDrive30i 252hp | 252 → 287 | +35 | 350 → 450 | +100 | Moderate (5.5/10) |
| xDrive30d 265hp | 265 → 310 | +45 | 620 → 650 | +30 | Good (6.5/10) |
| xDrive30d 286hp | 286 → 330 | +44 | 650 → 720 | +70 | Moderate (4.5/10) |
| M40d 326hp | 326 → 380 | +54 | 680 → 750 | +70 | Good (6.5/10) |
| M40i 360hp | 360 → 400 | +40 | 500 → 580 | +80 | Moderate (4.5/10) |
Get a personalised remap quote for your BMW X4. We'll connect you with a trusted professional in your area.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method.
We recommend discussing your specific vehicle with a qualified remap professional before proceeding.
