Source context
Ken Malinich developed this incomplete MSS52 XDF on an E39 M5 with the S62B50. The README and XDF header list the following software records. MSS52 project and software coverage.
| Software | ZB | Type | Program | Tune |
|---|---|---|---|---|
| 2113 2100 1601 D409 | 7837951 | 7833991 | 7837965 | 7837952 |
| 2113 2100 1601 D444 | 7837963 | 1407157 | 7837965 | 7837964 |
The two records share the listed program number and differ in tune, type and ZB identity. Keep each complete record with the original read; the common program number alone does not establish that two calibrations are interchangeable.
Definition file basis
The pinned XDF declares a 0x8000-byte region (32 KiB), starting at zero, with zero base offset. This is its declared editing basis. The repository does not supply a complete physical flash-layout specification. MSS52 XDF.
Calibration guides
- Definition coverage — precise software matching and source limitations.
- Fueling and lambda — factors, map dimensions and correction-state evidence.
- Ignition and VANOS — axis quantities, angle conventions and alternate views.
- Driver demand and torque — throttle representations, request paths and idle entry points.
Shared interpretation and validation guidance lives under MSS. D409 and D444 are software contexts within this ECU branch; future findings should retain that software scope.
Sources and evidence
Original Tuning Wiki reference notes. Definition data and source-code observations are identified as such; they do not establish runtime behaviour or a tested calibration. Validation suggestions and worked arithmetic are editorial guidance. Sources checked 10 November 2026.
MSS52: Ken Malinich (kdm) and the contributors credited by his project; copyright © 2019 Ken Malinich, MIT licence.
- MSS52 project and software coverage — commit a04c0d24fe63.
- MSS52 XDF — commit a04c0d24fe63.