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BMW · Stage 1

BMW 435d Stage 1 & Gearbox Tune (September 2025)

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

Published vehicle figures

Stock

313hp

630Nm

Stage 1

370hp

730Nm

Difference

+57hp

+100Nm

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

BMW 435d Stage 1 & Gearbox Tune (September 2025)

This BMW 435d went from 313hp and 630Nm to 370hp and 730Nm with our Stage 1 calibration and gearbox tune, a gain of 57hp and 100Nm.

Add-ons

  • Speed limiter solution
  • Sport dials updated
  • Gear display activation

Advanced dealer-level diagnostics were included before and after.

Is the 435d good to tune?

Its triple-turbo diesel gives huge torque, and a gearbox tune keeps the ZF 8-speed matched to it. We come to you across Bristol, North Somerset, Somerset and South Wales.

About this job

The results

Power went from 313hp to 370hp, an increase of 57hp or around 18%.

Torque rose from 630Nm to 730Nm (+100Nm), which is what you feel most in everyday driving: stronger pull from low revs and easier overtaking.

What the work involved

A Stage 1 remap is a software calibration for an otherwise standard car. We refine parameters such as boost, fuelling, ignition timing and torque limits within safe margins, so it pulls harder through the mid-range without any hardware changes.

The gearbox was tuned as well. A gearbox calibration raises the transmission's torque limits to suit the engine and can sharpen shifts and response, so both work together as one package.

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 335d and 435d tuning Check your gains
BMW 435d Stage 1 & Gearbox Tune (September 2025) 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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