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BMW · Stage 1

BMW 320i B48 Stage 1 (March 2026)

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

Published vehicle figures

Stock

184hp

270Nm

Stage 1

260hp

420Nm

Difference

+76hp

+150Nm

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

BMW 320i B48 Stage 1 (March 2026)

This BMW 320i went from 184hp and 270Nm to 260hp and 420Nm with our Stage 1 calibration, a gain of 76hp and 150Nm.

An immediate difference

The B48 has excellent tuning potential. The mid-range is much stronger, acceleration more urgent and the engine pulls harder through the rev range, without feeling aggressive.

ECU and tools

This car has a Bosch MG1CS003 ECU and was calibrated through the diagnostic port with AutoTuner.

Included

  • Speed limiter solution
  • Sports display recalibrated
  • Original ECU file backed up

Can every 320i be tuned through the OBD port?

It depends on the ECU. Send us your registration and we will check. We cover Bristol, North Somerset, Somerset and South Wales.

About this job

The results

This BMW 320i B48 now makes 260hp, up from 184hp as standard: 76hp more, an increase of around 41%.

Torque rose from 270Nm to 420Nm (+150Nm), which is what you feel most in everyday driving: stronger pull from low revs and easier overtaking.

What the work involved

Stage 1 is calibrated for a car with standard hardware. By refining boost, fuelling, timing and torque requests within the engine's safe limits, it delivers stronger, smoother acceleration and sharper throttle response.

How we carried it out

  • Diagnostic scan for stored faults before any work
  • Stabilised power supply connected while programming
  • Original software read and saved, so the car can be returned to standard
  • Calibration written, then the car checked again afterwards

Thinking about the same for your BMW?

We come to you from our Weston-super-Mare base, across Bristol, Somerset, Gloucestershire, Wiltshire, South Wales and parts of Devon and Dorset. Results depend on the exact car, so we confirm what suits yours before quoting.

BMW 320i and 330i tuning Check your gains
BMW 320i B48 Stage 1 (March 2026) photographed by MTechTuning
  • 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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