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Alientech news update: Bosch MED17.5.21 and MED17.5.25 new drivers update

24 August 2021
Alientech news update: Bosch MED17.5.21 and MED17.5.25 new drivers update

 Bosch MED17.5.21 and MED17.5.25 new drivers update

The Alientech team that deals with the Drivers update focused on the Bosch MED17.5.21 and MED17.5.25 equipped on Audi, Seat, Skoda, Volkswagen vehicles. Find out what you can get thanks to ECM Titanium and the updated maps that you will find in the Drivers! The ECU's involved are:

  • Bosch MED17.5.21
  • Bosch MED17.5.25

In addition to the standard maps useful to significantly increase the performance of these ECU's, we present some specific maps, which will lead you to even better results.

  • MED17.5.21


  • A1 1.0 TFSI 95CV e 110CV
  • A1 1.4 TFSI 122CV
  • A3 1.2 TFSI 110CV
  • A3 1.4 G-TRON 110CV
  • A3 1.4 TFSI 122CV e 140CV
  • Q2 1.0 TFSI 95CV e 110CV


  • Ibiza 1.4 TSI 140CV
  • Ibiza 1.0 TSI 95CV e 110CV
  • Leon 1.4 TGI 110CV
  • Leon 1.4 TSI 122CV
  • Leon 1.2 TSI 105CV


  • Octavia 1.2 TSI 105CV
  • Octavia 1.4 TGI 110CV
  • Octavia 1.4 TSI 122CV
  • Fabia 1.0 TSI 95CV e 110CV
  • Fabia 1.2 TSI 105CV


  • Golf 1.4 TGI 110CV
  • Golf 1.4 TSI 122CV
  • Golf 1.0 TSI 110CV
  • Golf 1.2 TSI 85CV e 105CV
  • Polo 1.0 TSI 95CV
  • T-Roc 1.0 TSI 95CV
  • MED17.5.25


  • A1 1.4 TSI 125CV e 150CV
  • A3 1.4 TSI 125CV e 150CV
  • Q2 1.4 TSI 150CV
  • Q3 1.4 TSI 150CV


  • Ibiza 1.2 TSI 110CV
  • Leon 1.4 TSI 150CV
  • Leon 1.4 TSI 125CV
  • Ateca 1.4 TSI 150CV


  • Fabia 1.2 TSI 90CV
  • Octavia 1.4 TSI 150CV
  • Superb 1.4 TSI 150CV
  • Yeti 1.4 TSI 150CV


  • Beetle 1.2 TSI 105CV
  • Beetle 1.4 TSI 150CV
  • Golf 1.2 TSI 105CV
  • Golf 1.4 TSI 122CV, 130CV e 150CV
  • Jetta 1.2 TSI 105CV
  • Jetta 1.4 TSI 130CV e 150CV
  • Polo 1.2 TSI 110CV
  • Polo GTS 1.4 TSI 150CV
  • Scirocco 1.4 TSI 125CV e 150CV
  • Tiguan 1.4 TSI 125 e 150CV
  • Touran 1.4 TSI 130CV

Driver for ECM Titanium
BOSCH MED17.5.21 and MED17.5.25

The special functions that can be modified using the new updated drivers for MED17.5.21 and MED17.5.25 are the following:

Thanks to the introduction of fuel cut management maps, it is possible to delay the intervention of this function to obtain the effect of  the explosions (pops and bangs) when the accelerator is released.

In addition to delaying the fuel cut, it is necessary to intervene on the advance maps in order to obtain the best possible effect, for this reason all the necessary maps of this category are now available in the drivers:

To the standard maps that allow you to increase the rev limiter, the possibility of working on the rev limiter for non-moving vehicles (when the vehicle is not moving) has also been introduced, which is set at a very low value for anti-pollution regulations, this map also works on vehicles with automatic gearbox (the limiter in this case is active when the gearbox is in position D or N)

These maps allow the installation of a direct exhaust system (without catalyst), preventing the appearance of DTC's and warning lights / engine failure.


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