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From MS4X Wiki
Revision as of 00:57, 5 March 2023 by Sda2 (talk | contribs)

Welcome to the MS4X Wiki

Ms4x join us on discord.png

Thanks to the massive community around the Siemens MS4 ECU generations this wiki is growing very fast.

Because of gaining more and more content, we had to start seperation of the ECU specific topics and keep common things together.

This means we seperate topics like flashing tools, tuning programs, bootmode activivation, etc. which are the same for all ECU models into own pages.

So don't be confused when common topics disappear out of the huge ECU pages and look for cross references. In addition to that we create a table of content right here below.

If you use knowledge of this site for your tuning business, please consider a small donation to support the project, thank you (Paypal:


First Steps And Requirements
Siemens Keyword Translation
How To Connect
Live Tuning Options

ECU & TCU Tuning:

Siemens MS42
Siemens MS43
Siemens MS45
Siemens GS20


Siemens MS42 CAN Bus
Siemens MS42 PCB Components
Siemens MS42 Pinout
Siemens MS43 CAN Bus
Siemens MS43 PCB Components
Siemens MS43 Pinout
Siemens MS45 Pinout
Siemens MS45 PCB Components

Data Logging:

TunerPro Data Logging


Flashing Tools
Definition Files
Firmware Files
TunerPro MS42 Community Patchlist
TunerPro MS43 Community Patchlist

Forced Induction Upgrades:

2048kg/h MAF Sensor Switch
Audi RS4 MAF Sensor Conversion
B58 Ignition Coil Conversion
PMAS HPX MAF Sensor Conversion
Siemens MS43 Extended Load Limit
Siemens MS43 Retrofit MAP Sensor
Use Rear O2 Inputs For Analog Sensors

Additional Stuff:

3D Printable Parts
Aftermarket Upgrade Sensor Data
Engine Wiring Harness Connectors
Fuel Injector Deadtimes