EU customers, please read before purchasing

Important Info

Search our store

127 reviews

2709-235-BA

mTune SMARTflash m235 Upgrade [Mk8 Fiesta ST]

The mountune m235 power upgrade for the Mk8 Fiesta ST provides a substantial uplift in the performance from the ST's 1.5-litre 3-cylinder EcoBoost engine, safely raising power and torque output; improving performance and drivability, whilst adding a host of functionality, unique to mountune.

As with all mountune upgrades, it's had to pass our own stringent durability testing criteria, which included additional months of in-cylinder pressure monitoring to ensure engine robustness, whilst retaining all safety parameters, so you can have complete peace of mind that you're not just buying the best 'first stage' upgrade for your Fiesta ST, but also the most robust aftermarket calibration, too.

Peak power is increased to 235PS, whilst torque is uplifted to 350Nm but, as can be seen from the power graphs, it's the substantial increase throughout the rev-range and the way the torque is delivered that transforms the driving experience.

Working together with industry leading software and hardware teams has enabled the very latest technology available to be incorporated, taking mTune - and making it a whole lot smarter!

The mTune SMARTflash app allows you to easily DIY install and update calibrations to your ECU using nothing more than our app, the supplied Bluetooth OBD interface and your Smartphone; no laptop, no wires, no handsets, no problem!

The latest version of SMARTflash also provides additional functionality, such as: fully configurable gauge displays using the OBD data-stream, comprehensive data-logging and a built-in performance meter, too.

m235 SMARTflash includes four calibrations, with unique functionality:

  • m235 performance calibration
Increased power and torque (up to 235PS / 350Nm)
More aggressive launch control strategy
Enhanced audible exhaust output in Sport / Track modes
Optimised no-lift shift functionality
  • m235 ASMO performance calibration
    Increased power and torque (up to 235PS / 350Nm)
    More aggressive launch control strategy
    Anti Social Mountune Overrun Enhanced audible exhaust output in Sport / Track modes (for those who really like their pops and bangs)
      • Stock performance
      • Anti-theft

    Please note: in order to update to our SMARTflash V2 release, you will now need to download our partner app, ECU Connect - once 'mountune' is selected within the tuner menu of the app you will have full access to the SMARTflash V2 features.

    For assistance setting up and installing SMARTflash V2, please refer to the user guide, here.




    Important: In order to achieve and maintain performance and reliability, the m235 upgrade should be used in conjunction with the hardware listed below. To achieve peak performance figures 97RON+ fuel should be used, however, it remains perfectly safe to use everyday and for all uses on 95RON fuel.

    Recommended m235 hardware:

    m235 supports all known regional variations and as it can be installed and removed anywhere in the world, at any time yourself, you could say the power's in your hands, quite literally!

    The phone device is shown for illustration of SMARTflash app only, and is not included with this product.

    Our numbers don't lie

    m235 delivers a substantial, yet safe increase in power and torque across the entire rev-range. 
    genuine gains of up to 65nm and 36ps over the oe calibration transform the driving dynamic and in-gear performance and also allows the sprint from 0-60mph to arrive in just 5.9secs and knock well over a second off ford's standardised in-gear 31-62mph benchmark!

    power output may vary based on individual vehicle condition, fuel grade and method of recording.

    please note: all hardware is supplied as standard with a 12-month, 12,000-mile warranty against manufacturing defects.
    installing the m235 calibration without the correct hardware may result in failure to achieve the quoted power / torque figures, abnormal running, detrimental fuel consumption or engine warning light illumination or, in extreme circumstances, damage to and / or failure of the engine. in any such instance no warranty is offered or implied by mountune.

    by purchasing this product you agree for mountune to send you email about new updates or technical features relating to smartflash. you can opt out at any time.

    Customer Reviews
    5.0 Based on 127 Reviews
    5 ★
    96% 
    122
    4 ★
    4% 
    5
    3 ★
    0% 
    0
    2 ★
    0% 
    0
    1 ★
    0% 
    0
    Customer Photos
    Write a Review Ask a Question

    Thank you for submitting a review!

    Your input is very much appreciated. Share it with your friends so they can enjoy it too!

    Filter Reviews:
      JB
      30/07/2022
      Jonathan B.
      Australia Australia

      M235 tune

      Big thumbs up, love it and so easy to install.

      CM
      13/07/2022
      Carl M.
      United Kingdom United Kingdom

      M235 upgrade

      What a difference it has made to my car . The whole process of installing was easy.no problems at all. Just to let you know it’s that good I’m saving my pennies for the m260 and mountune intercooler

      A
      03/07/2022
      Anonymous
      United Kingdom United Kingdom

      Very Happy

      The upgrade made more of a difference than I expected. Stronger throughout the range without any issues with drive ability. Very happy.