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Home / ECU Remapping / BMW X3 28i
N20 Engine

BMW X3 28i

F25

The F25 X3 28i with the N20 turbo four. ECU remapping improves throttle response and adds useful power for overtaking and towing.

245 Stock BHP
290 Stage 1 BHP
340+ Stage 3 Ceiling
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BMW X3 28i F25
Performance Stages

N20 Tuning Stages

All power figures are average estimates based on typical results. Actual gains depend on vehicle condition, fuel quality and supporting modifications.

01

Stage 1

270-290 bhp

Software only. No hardware changes required. Custom ECU calibration on fully standard engine.

  • Custom map written in-house
  • No additional parts needed
  • Fully reversible
02

Stage 2

300-320 bhp

Calibrated for bolt-on modifications. Downpipe, intake and supporting hardware.

  • Requires supporting hardware
  • Mapped to your specific mods
  • Data-logged and validated
03

Stage 3

340+ bhp

Full custom calibration for serious builds. Hybrid turbos, uprated fuelling and bespoke mapping.

  • Hybrid or upgraded turbo
  • Uprated fuel system
  • Bespoke build calibration

Ready to Tune Your X3 28i?

Get in touch to discuss your build. Every map is written in-house and tailored to your car.

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