BHP+29 hp (9%)
Standard
306 hp
Tuned
335 hp
Torque+35 Nm (9%)
Standard
390 Nm
Tuned
425 Nm
Suitability
Limited (3.5/10)Gains Profile
BalancedHeadroom
LowBMW 7 Series 740i 306hp ECU Remapping
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.
How this engine compares
- 36thof 48 BMW 7 Series engines by power gain
- 38%of the 9,842 engines we hold gain data for see a smaller power increase
- 20%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 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.
Considerations
!Naturally aspirated engine: gains are usually limited; results vary widely.
!High tuned torque: check transmission torque capacity and service history.