Considering an ECU remap for your BMW 7 Series 740D 258hp? A Stage 1 remap can take this E65 - 2002 - 2008 diesel engine from 258 BHP to 300 BHP and from 600 Nm to 700 Nm of torque (turbocharged). This engine scores 6.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your BMW 7 Series can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The BMW 7 serie 740D 258hp is a 3.9L turbocharged diesel engine producing 258 BHP and 600 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 300 BHP and 700 Nm — a gain of around 42 BHP (16%) and 100 Nm (17%).
This engine has moderate 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 ECU is typically a Bosch EDC15 (likely), and the transmission is many variants use zf 5/6-speed automatics (where fitted); manuals also exist. at this torque level, transmission and driveline servicing history becomes especially important..
Considerations: High tuned torque: check transmission torque capacity and service history.. Older diesel: injector, turbo and intake condition can affect results; ensure maintenance is up to date.
Fuel economy note: possible improvement with conservative driving.
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) |
| 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) |
| 740i 306hp | 306 → 335 | +29 | 390 → 425 | +35 | Limited (3.5/10) |
| 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.
