BHP+42 hp (16%)
Standard
258 hp
Tuned
300 hp
Torque+100 Nm (17%)
Standard
600 Nm
Tuned
700 Nm
Suitability
Good (6.5/10)Gains Profile
BalancedHeadroom
MediumBMW 7 Series 740D 258hp ECU Remapping
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.
How this engine compares
- 30thof 48 BMW 7 Series engines by power gain
- 69%of the 9,842 engines we hold gain data for see a smaller power increase
- 79%of engines with torque data see a smaller torque increase
Comparisons are calculated from our own recorded Stage 1 figures.
Assessment
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.
Considerations
!High tuned torque: check transmission torque capacity and service history.