Siemens MS4x & Motorsport (MSS/MSD) Naming Grammar

Just as Bosch utilizes a deterministic 8-character stem format ([V][GG][BB][RR][R]) on VAG platforms (as reverse-engineered in DOC_35), BMW’s primary engine management suppliers—Siemens VDO and Bosch Diesel/Gasoline Systems—adhere to rigorous internal naming conventions. Understanding these taxonomies allows an engineer to immediately deduce the processor family, vehicle generation, market variant, emissions tier, and software revision from the filename alone.

3.1 Siemens MS4x & Motorsport (MSS/MSD) Naming Grammar#

Siemens engine management software builds use a structured alphanumeric project code:

┌──────────────────────────────────────────────────────────────────────────────────────────────────┐  
│                   SIEMENS VDO PROJECT TAXONOMY & GRAMMAR BREAKDOWN                               │  
├──────────────────────────────────────────────────────────────────────────────────────────────────┤  
│                                                                                                  │  
│   Pattern A (Generation & Release Code - MS43 / MS42):                                           │  
│   Format: [GG][VV][RR]                                                                           │  
│   • [GG] = DME Generation: "42" (MS42), "43" (MS43), "45" (MS45), "54" (MSS54), "80" (MSD80)      │  
│   • [VV] = Vehicle / Variant Sub-Family: "00" (Baseline / Production), "25" (M54B25), "23" (M52)│  
│   • [RR] = Software Release Step: "69" (Final MS430069), "56" (430056), "55" (430055), "37"     │  
│   Example: MS430069 ──► MS43 Generation, Baseline Branch 00, Final Release 69.                   │  
│                                                                                                  │  
│   Pattern B (Extended Engineering ASAP2 File Stem - MS45 / MSD / MSS):                          │  
│   Format: [G][M][B][R][E]                                                                        │  
│   • [G] = Hardware Family: "4" (MS45), "5" (MSS52/54), "7" / "8" (MSD80/85), "R" (MG1 B58)       │  
│   • [M] = Market / Emissions Tier: "5" (Euro 3/4), "7" (US Tier 2 / LEV2 Wideband), "2" (RoW)    │  
│   • [B] = Branch / Engine Variant: "LG" (M54B30 ZHP), "BN" / "D3" (Euro 525i/530i), "02"        │  
│   • [R] = Software Revision Level: "23", "30", "00"                                              │  
│   • [E] = Engineering Role Flag: "S" (Series Production), "P" (Prototype), "T" (Test Calibration)│  
│   Examples:                                                                                      │  
│     • 457LG23P ──► MS45, US Wideband Tier 2 (7), M54B30 Branch (LG), Rev 23, Prototype Baseline│  
│     • 4520D30S ──► MS45, Euro Narrowband (2), M54B25 Branch (D3), Rev 00, Series Production    │  
│     • 80B37E0E ──► MSD80, N54 Twin-Turbo 3.0L Branch, Engineering Baseline E0                   │  
│     • 52_V508  ──► MSS52/MSS54, S54B32 / S62B50 Motorsport Branch, Version 5.08 Baseline       │  
└──────────────────────────────────────────────────────────────────────────────────────────────────┘  

Meaning of Engineering Role Flags:#

3.2 Bosch DDE Turbodiesel Taxonomy (EDC15 / EDC16 / EDC17)#

Bosch Digital Diesel Electronics files follow the established Motronic nomenclature:

3.3 Bosch MEVD17 & MG1 Modular B-Series Taxonomy#

Modern modular BMW calibrations utilize an expanded AUTOSAR identifier: