Considering an ECU remap for your BMW 7 Series 740i 306hp? A Stage 1 remap can take this E65 - 2002 - 2008 petrol engine from 306 BHP to 335 BHP and from 390 Nm to 425 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 7 Series can achieve.
The BMW 7 serie 740i 306hp is a 4.0L naturally aspirated petrol engine producing 306 BHP and 390 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 335 BHP and 425 Nm — a gain of around 29 BHP (9%) and 35 Nm (9%).
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 limited, based on the percentage gain available from the factory output.
From a technical perspective, the transmission is many variants use zf 5/6-speed automatics (where fitted); manuals also exist..
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 |
|---|---|---|---|---|---|
| 730D 204hp | 204 → 250 |
| +46 |
| 410 → 500 |
| +90 |
| Good (7.5/10) |
| 730D 211hp | 211 → 270 | +59 | 500 → 580 | +80 | Good (7.5/10) |
| 730D 218hp | 218 → 270 | +52 | 500 → 580 | +80 | Good (6.5/10) |
| 730D 231hp | 231 → 280 | +49 | 520 → 620 | +100 | Good (7.5/10) |
| 740D 258hp | 258 → 300 | +42 | 600 → 700 | +100 | Good (6.5/10) |
| 730i 258hp | 258 → 272 | +14 | 300 → 320 | +20 | Moderate (4/10) |
| 735i 272hp | 272 → 287 | +15 | 360 → 380 | +20 | Moderate (4/10) |
| 745D 300hp | 300 → 340 | +40 | 700 → 800 | +100 | Good (6/10) |
| 745i 333hp | 333 → 353 | +20 | 450 → 470 | +20 | Limited (3.5/10) |
| 750i 367hp | 367 → 394 | +27 | 490 → 520 | +30 | Limited (3.5/10) |
| 760i 445hp | 445 → 462 | +17 | 600 → 630 | +30 | Limited (3/10) |
Get a personalised remap quote for your BMW 7 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.
