Considering an ECU remap for your BMW 3 Series M340d 340hp? A Stage 1 remap can take this G2x - 2019 -> 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 3 Series can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The BMW 3 serie M340d 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 |
|---|---|---|---|---|---|
| 318d 136hp | 136 → 190 | +54 | 320 → 400 | +80 | Excellent (8.5/10) |
| 318d 150hp | 150 → 190 | +40 | 320 → 400 | +80 | Excellent (8/10) |
| 318i 156hp | 156 → 260 | +104 | 250 → 420 | +170 | Good (6.5/10) |
| 320d 163hp | 163 → 220 | +57 | 400 → 480 | +80 | Moderate (5.5/10) |
| 320i 184hp | 184 → 250 | +66 | 300 → 440 | +140 | Good (6.5/10) |
| 320i (GPF) 184hp | 184 → 220 | +36 | 290 → 370 | +80 | Moderate (5.5/10) |
| 320d 190hp | 190 → 220 | +30 | 400 → 480 | +80 | Good (7/10) |
| 330e 252hp | 252 → 340 | +88 | 420 → 540 | +120 | Good (6.5/10) |
| 330i 258hp | 258 → 287 | +29 | 400 → 450 | +50 | Moderate (4.5/10) |
| 330d 265hp | 265 → 310 | +45 | 580 → 720 | +140 | Good (7.5/10) |
| 330d 286hp | 286 → 330 | +44 | 650 → 720 | +70 | Moderate (4.5/10) |
| 330e Hybrid 292hp | 292 → 400 | +108 | 420 → 700 | +280 | Good (6.5/10) |
| M340i 374hp | 374 → 420 | +46 | 500 → 575 | +75 | Moderate (4.5/10) |
Get a personalised remap quote for your BMW 3 Series. 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.
