Considering an ECU remap for your BMW X5 3.5i 306hp? A Stage 1 remap can take this F15 - 2013 - 2018 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 X5 can achieve.
The BMW X5 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.
| Engine | BHP | Gain | Torque | Gain | Score |
|---|---|---|---|---|---|
| 2.5D 218hp | 218 → 270 | +52 | 450 → 500 | +50 | Good (7/10) |
| xDrive 25d 231hp | 231 → 270 | +39 | 500 → 550 | +50 | Good (6.5/10) |
| 2.5D 231hp | 231 → 270 | +39 | 500 → 550 | +50 | Good (6.5/10) |
| 2.8i 245hp | 245 → 290 | +45 | 350 → 430 | +80 | Moderate (5.5/10) |
| 3.0D 258hp | 258 → 310 | +52 | 560 → 650 | +90 | Good (7/10) |
| xDrive40e Hybrid 313hp | 313 → 400 | +87 | 450 → 630 | +180 | Good (6.5/10) |
| 4.0D 313hp | 313 → 365 | +52 | 630 → 760 | +130 | Good (7/10) |
| M 5.0D 381hp | 381 → 420 | +39 | 740 → 800 | +60 | Moderate (5.5/10) |
| 5.0i 450hp | 450 → 540 | +90 | 650 → 780 | +130 | Moderate (5.5/10) |
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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.
