# MS4X

> MS4X analyzes Siemens MS42 and MS43 engine-control firmware for BMW M52TU and M54 engines. Its Python tools disassemble and assemble C166 instructions and inspect image checksums, stock-code differences and TunerPro patchlists; companion documents cover memory maps and findings in the factory programs.

- Type: Tool
- Targets: Firmware
- Category: Firmware tools
- Relationship: Foundation tool
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-06
- Original resource: <https://github.com/therudywolf/MS4X>
- Primary source: <https://github.com/therudywolf/MS4X/blob/ac5e4cddbfc7afce3d30b598bbeaee759ad3f31c/README.md>
- Catalog page: <https://awesomerea.org/resources/ms4x/>
- Record JSON: <https://awesomerea.org/resources/ms4x/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/ms4x/index.md)

## Requirements & limits

- **Prerequisites:** Python 3 and a user-supplied MS42 or MS43 image.
- **Limits:** New material is paused; the author says error reports are still addressed.
- **License:** Code is Apache-2.0; documents and data are CC BY-SA 4.0.

## Primary sources

1. <https://github.com/therudywolf/MS4X/blob/ac5e4cddbfc7afce3d30b598bbeaee759ad3f31c/README.md>

## More in Firmware and hardware

- [AC46 Firmware Tool](https://awesomerea.org/resources/ac46-firmware-tool/index.md) · Tool
- [Bin X-ray](https://awesomerea.org/resources/bin-xray/index.md) · Tool
- [PIC microcontrollers disassembler](https://awesomerea.org/resources/pic-disasm/index.md) · Tool
- [premium5](https://awesomerea.org/resources/premium5-radio-emulator/index.md) · Tool
- [SPRD Flash Tool](https://awesomerea.org/resources/sprdflash-rs/index.md) · Tool
- [PCM Explorer](https://awesomerea.org/resources/pcm-explorer/index.md) · Tool

## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.