ENGINE · 2009-2016
N55 tuning
N55 — BMW 3.0 single-turbo petrol. I6 single-turbo direct injection, 3.0 L, 300-326 HP stock. Cars: BMW 135is, M135i F20, 335i F30, M235i F22, X3 35i, X4 35i.
Engine specs
| Engine code | N55 |
|---|---|
| Configuration | I6 single-turbo direct injection |
| Displacement | 3.0 L |
| Production years | 2009-2016 |
| Stock power | 300-326 HP |
| ECU family | Bosch MEVD17.2 / MEVD17.2.9 → |
Tuning stages on N55
| Stage 1 | +50-70 HP |
|---|---|
| Stage 2 | +90-120 HP (FBO + JB4) |
| Stage 3 | +150+ HP (turbo upgrade) |
Conservative real-world estimates. Actual results depend on hardware health, fuel quality, ambient temperature, and the specific calibration written.
Services available on N55
Common DTC codes on N55
Brands running N55
Workshop workflow
- Read the N55 ECU via OBD or bench using your existing flasher (KESS3, AutoTuner, MPPS, Trasdata, FRF).
- Open Softechpro V5 and drag the .bin / .ori / .hex / .s19 / .frf onto the workspace. The Bosch MEVD17.2 variant is auto-detected.
- Pick the service tab and apply Stage 1 / 2 / 3 / DPF OFF / EGR OFF / AdBlue OFF as required.
- Save patched .bin — the TPROT + multi-block CRC32 is recomputed automatically.
- Flash via your existing flasher. Adaptation reset via OEM scan tool if required.