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BMW · Stage 1

BMW M135i F40 Stage 1 & Same-Day MG1 ECU Unlock

A mobile Stage 1 calibration by MTechTuning, with dealer-level diagnostics before and after tuning.

Published vehicle figures

Stock

306hp

450Nm

Stage 1

335hp

500Nm

Difference

+29hp

+50Nm

Figures published for this vehicle. Results vary with model year, software, fuel and condition, so we confirm what suits your car before quoting.

BMW M135i F40 Stage 1 & Same-Day MG1 ECU Unlock

This BMW M135i F40 went from 306hp and 450Nm to around 335hp and 500Nm with our Stage 1 ECU calibration, after its locked Bosch MG1CS201 ECU was unlocked at the customer's address in the same appointment.

B48 power with xDrive

The F40 M135i uses BMW's B48 2.0-litre turbocharged engine with xDrive. Stage 1 improves mid-range torque, throttle response and acceleration while keeping the smooth, progressive drivability you expect from the car.

Same-day MG1CS201 ECU unlock

The newer Bosch MG1CS201 ECU is locked from the factory and has to be unlocked before tuning. We removed the ECU, unlocked it on the bench, refitted it and completed the Stage 1 calibration on the driveway. No ECU mail-in, no days waiting and no second appointment.

What was included

  • Same-day Bosch MG1CS201 ECU unlock
  • Stage 1 ECU calibration
  • Speed limiter solution
  • BMW Sports Display recalibration
  • Original ECU file backed up
  • Dealer-level diagnostics before and after

Can the F40 M135i be tuned without sending the ECU away?

Yes, for supported ECUs and software versions. We unlock and tune at your home or workplace in one visit across Bristol, North Somerset, Somerset and South Wales. Send us your registration and we will confirm what your car needs.

BMW M135i F40 Stage 1 & Same-Day MG1 ECU Unlock photographed by MTechTuning

Video from this job

  • Dealer-level diagnostics before and after
  • Fully mobile, at home or work
  • Lifetime software warranty and support
  • 14-day money-back guarantee

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Talk through your vehicle

Find out what your car can do.

Share your registration, mileage and what you would like to improve. We're always online to quote and reply, and we'll confirm what is suitable before booking, then come to you. Fully mobile from our Weston-super-Mare base across Bristol, Somerset, Gloucestershire, Wiltshire, South Wales and parts of Devon and Dorset.

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