BHP+22 hp (7%)
Standard
333 hp
Tuned
355 hp
Torque+30 Nm (7%)
Standard
450 Nm
Tuned
480 Nm
Suitability
Limited (3.5/10)Gains Profile
Limited headroomHeadroom
LowBMW 6 Series 645ci 333hp ECU Remapping
Considering an ECU remap for your BMW 6 Series 645ci 333hp? A Stage 1 remap can take this E63 - 2004 - 2010 petrol engine from 333 BHP to 355 BHP and from 450 Nm to 480 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 6 Series can achieve.
How this engine compares
- 18thof 19 BMW 6 Series engines by power gain
- 25%of the 9,842 engines we hold gain data for see a smaller power increase
- 17%of engines with torque data see a smaller torque increase
Comparisons are calculated from our own recorded Stage 1 figures.
Assessment
The BMW 6 serie 645ci 333hp is a 4.4L naturally aspirated petrol engine producing 333 BHP and 450 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 355 BHP and 480 Nm — a gain of around 22 BHP (7%) and 30 Nm (7%).
This engine has limited remap suitability, though the available headroom is limited, so gains are modest compared to higher-output variants. 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. 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.
Considerations
!Naturally aspirated engine: gains are usually limited; results vary widely.
!High tuned torque: check transmission torque capacity and service history.