Considering an ECU remap for your BMW 4 Series M440i 374hp? A Stage 1 remap can take this G22 - 2020 - 2024 petrol mhev engine from 374 BHP to 420 BHP and from 500 Nm to 575 Nm of torque (naturally aspirated). This engine scores 4.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your BMW 4 Series can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The BMW 4 serie M440i 374hp is a 3.0L naturally aspirated petrol mhev engine producing 374 BHP and 500 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 420 BHP and 575 Nm — a gain of around 46 BHP (12%) and 75 Nm (15%).
This engine has limited remap suitability, with a balanced spread of gains across both power and torque — providing a noticeable improvement across the rev range. The tuning headroom is classified as moderate, 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 |
|---|---|---|---|---|---|
| 420i 184hp | 184 → 250 | +66 | 300 → 440 | +140 | Good (6.5/10) |
| 420d 190hp | 190 → 220 | +30 | 400 → 480 | +80 | Moderate (5/10) |
| 430i 258hp | 258 → 287 | +29 | 400 → 450 | +50 | Moderate (4.5/10) |
| M440d 340hp | 340 → 380 | +40 | 700 → 750 | +50 | Limited (3.5/10) |
Get a personalised remap quote for your BMW 4 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.
