Diving into the world of ECU tuning might bring you face-to-face with an array of specialized terminology and complex components. A key factor in assessing the ability to tune an engine is understanding the engine control unit (ECU) involved. With a plethora of ECU variants out there, it can seem daunting. Yet, Bosch, a leading ECU manufacturer, has implemented a straightforward naming strategy that eases the identification process. Let’s explore a simplified guide for distinguishing between the various Bosch ECUs.
How to understand the logic Bosch ECU manufacturers use?

Understanding the Bosch ECU Designations:
Part 1:
Bosch ECU References
MED17.1.1
M: Motronic – This is the name given to the electronic control unit by Bosch.
E: Electronic throttle control system (not cable-operated).
D: Direct injection system.
17: Bosch version of the ECU.
1.1: ECU type (reserved for VAG here).
MG1CS201
M: Motronic – This is the name given to the electronic control unit by Bosch.
G: Gasoline _ This is a gasoline engine.
1: Bosch version of the ECU.
C: Common rail – This is a common rail injection system.
s: Solenoid _ These are solenoid injectors
201: ECU type (reserved for BMW here).
MD1CP002
M: Motronic – This is the name given to the electronic control unit by Bosch.
D: Diesel _ This is a diesel engine
1: Bosch version of the ECU.
C: Common rail – This is a common rail injection system.
P: Piezo – These are piezo-electric injectors.
002: ECU type (reserved for Mercedes here)
Simple Methods to Identify Your ECU:
Option 1. Browse
http://121.201.38.244:19320/bosch.htm.
Just input the part number (Don’t leave spaces), and despite the site being in Chinese, the ECU type is easily discernible.

Option 2.
Another helpful resource is https://bed.kmtech.fr/index_en.php.a site dedicated to identifying ECUs across various brands by their part numbers.

Option 3. Alternatively, consider specialized software solutions like the ‘BOSCH ECU Database’ which might be a paid resource but offers a comprehensive database for ECU identification.

With these ways and a bit of know-how about Bosch’s logical labeling system, you’ll be pinpointing the right ECU for your ECU tuning needs in no time.