BHP+59 hp (19%)
Standard
306 hp
Tuned
365 hp
Torque+120 Nm (30%)
Standard
400 Nm
Tuned
520 Nm
Suitability
Moderate (5.5/10)Gains Profile
Torque-focusedHeadroom
HighBMW X3 3.5i 306hp ECU Remapping
Considering an ECU remap for your BMW X3 3.5i 306hp? A Stage 1 remap can take this F25 - 2011 - 2017 petrol engine from 306 BHP to 365 BHP and from 400 Nm to 520 Nm of torque (naturally aspirated). This engine scores 5.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your BMW X3 can achieve.
How this engine compares
- 13thof 41 BMW X3 engines by power gain
- 85%of the 9,842 engines we hold gain data for see a smaller power increase
- 87%of engines with torque data see a smaller torque increase
Comparisons are calculated from our own recorded Stage 1 figures.
Assessment
The BMW X3 3.5i 306hp is a 3.0L naturally aspirated petrol engine producing 306 BHP and 400 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 365 BHP and 520 Nm — a gain of around 59 BHP (19%) and 120 Nm (30%).
This engine has moderate remap suitability, with gains weighted towards torque — you will notice the difference most strongly in mid-range pulling power and in-gear acceleration. The tuning headroom is classified as high, based on the percentage gain available from the factory output.
From a technical perspective, the transmission is many variants use zf 8-speed automatic (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.. Unusually high gain for NA engine: treat as an estimate and verify against the exact engine variant.. High tuned torque: check transmission torque capacity and service history.. Large torque increase: drivetrain condition (clutch/gearbox) becomes more important at this level.
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.