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WikiSiemens MS45History

Siemens MS45

Revision 2

by llandowtuninguk@gmail.com
Expand from MS4X with shared MS guidance, ECU/software-specific detail and permanent source citations.

This is a historical revision. Read the current page or return to its history.

Page organisation in this revision
Page type
ECU hub
Subject
ECUs
Parent
Siemens MS
Applies to
No ECU-specific applicability
Tool groups
Not recorded in this older revision
Manufacturers
Not recorded in this older revision

Choose the variant

Use MS45.0 or MS45.1 for sensor and definition details. Common MS45 material remains here and in the two family guides below.

Image sizes and address ranges

MS4X lists a 1024 kB external-flash image. Its overview calls the parameter area approximately 128 kB, while giving 0x40000–0x5CF7F and a padded end of 0x5CFFF. The Definition Files page lists 116 kB partials. MS4X reference; MS4X reference.

Calculated inclusively, those ranges contain 118,656 bytes (115.875 KiB) and 118,784 bytes (116 KiB), respectively. They do not describe a complete 128 KiB slice. Keep the tool’s actual byte count, headers/padding and address origin in the file record; use the format expected by the selected definition and writer.

Integrity and authenticity

The source distinguishes a main CRC32, an additional monitoring checksum and RSA validation for OBD programming. Correcting a CRC alone does not supply a valid signature. MS4X reference.

For the selected software and write method, record how each required check is handled. Use current primary tool documentation for compatibility; the older overview’s list of products is historical context rather than a verified current support matrix.

Calibration guides

Keep software-specific addresses and conversions with their definition. Document an observed result with the exact MS45.0 or MS45.1 variant rather than assigning a universal value to MS45.

Sources and scope

Original reference notes by Tuning Wiki, informed by the linked MS4X Wiki pages. MS4X Wiki contributors and the authors credited by each linked project remain the source authors. Sources checked 10 November 2026. Suggested validation steps and worked arithmetic are editorial guidance; they are not a tested calibration or a claim of hardware verification.