Category Chiptuning
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Tuning example Bosch MD1CS001 DDE803P - BMW - 2.0l Diesel

  • Description

BMW 5 Series 520d  is equipped with mild hybrid 2.0l turbo Diesel engine with 140 kW of maximum power and a 8 speed automatic transmission.

  • Bosch MD1CS001 DDE803P
  • 2.0l
  • BMW 5 Series 520d, 2020, turbo Diesel mild hybrid

BMW 5 Series 520d mild hybrid, the future of the electric automotive is on the road and Alientech is ready.

The advantages of hybrid vehicles such as the reduction of consumption and silence are evident, but is it possible to look for an increase in performance by modifying the original file on the ECU?

Find it out with this cutting-edge tuning procedure developed by Alientech experts, starting from the innovative BMW mild-hybrid 2.0l turbo Diesel engine.

This remapping practice will provide you with all the information you need to process the Bosch MD1CS001 DDE803P ECU. The same control unit is equipped on numerous other vehicles that share the BMW mild hybrid engine, check below all the vehicles on which you can put this tuning procedure into practice:

Compatible vehicles with the same engine, ECU, and maximum power:

Model name Engine model Generation
5   series 520d (G30 – G31 LCI) 8AT B47D20O1 7   LCI (MY2020)
5   series 520d xDrive (G30 – G31 LCI) 8AT B47D20O1 7   LCI (MY2017)
3   series 320d (G20 – G31) 8AT B47D20O1 7   (MY2020)
3   series 320d xDrive (G20 – G31) 8AT B47D20O1 7   (MY2020)
4   series 420d (G22 – G23) 8AT B47D20O1 2   (MY2020)
4   series 420d xDrive (G22 – G23) 8AT B47D20O1 2   (MY2020)
6   series 620d xDrive Gran Turismo (G32) 8AT B47D20O1 4   LCI (MY2020)
X3   series xDrive20d (G01) 8AT B47D20O1 3   (MY2020)
X4   series xDrive20d (G02) 8AT B47D20O1 2   (MY2020)
3 series 320d (G20 – G21) 8AT B47D20O1 7 (MY2020)
3   series 320d xDrive (G20 – G21) 8AT B47D20O1 7 (MY2020)
4 series 420d (G22 – G23) 8AT B47D20O1 2 (MY2020)
4   series 420d xDrive (G22 – G23) 8AT B47D20O1 2 (MY2020)
5 series 520d xDrive (G30 – G31) 8AT B47D20O1 7 LCI (MY2020)
5   series 520d (G30 – G31) 8AT B47D20O1 7 LCI (MY2020)
5   series 518d (G30 – G31) 8AT B47D20O1 7 LCI (MY2017)
6 series 620d xDrive Gran Turismo (G32) 8AT B47D20O1 4 LCI (MY2020)
X3 series xDrive20d (G01) 8AT B47D20O1 3 (MY2020)
X4 series xDrive20d (G02) 8AT B47D20O1 2 (MY2020)

Compatible vehicles with the same engine, ECU, but different maximum power:

Model name Engine code Power Generation
3   series 316d (G20 – G21) 8AT B47D20O1 90kW 7   (MY2020)
3   series 318d (G20 – G21) 8AT B47D20O1 110kW 7   (MY2020)


Our technicians are very attentive to safety. All the steps of this practical example will lead you, in just 30 minutes, to safe results already tested on the test bench. Guaranteed by Alientech!

Whether you are an expert or a beginner, it doesn’t matter. You can decide to follow step by step the procedure specifically developed for this engine and control unit or use it as a starting point to integrate with your experience as a tuner. The choice is yours.

Be ready for the future of automotive with Alientech Academy!


A tuning practical example lasting around 20 minutes, composed of 3 sections:

First section:

in this part of the tuning practice, we will describe the characteristics of the vehicle by listing version, equipment, year of production, traction, and type of gearbox. Then, we indicate all the vehicles – even of different car manufacturers – equipped with the same engine or similar version; immediately after, the specifications of the engine control unit will be specified in detail: that is the identification data and the versions for the emission classes. In addition, we talk about the types of connection with Alientech tools – which are useful for the remapping – by indicating the protocols of use, the available functions, and giving some practical advice for editing operations. Finally, the structure of the original file is presented by indicating the addresses and the various areas.

Second section:

this part directly addresses the remapping practice. After a brief introduction, we present the summary list of the maps that will be modified, the Alientech modification method, and its specific application to the vehicle in question. Following the wizard of this practical example, you will be able to create a mapping that will ensure high performance and guaranteed reliability.

Third section:

this last part is dedicated to the discovery of the potentialities of this remapping practice: the new increases, compared to the original settings of the vehicle in a precise and detailed chart, clarify efficaciously how this remapping practice is effective and surprising.