Siemens MS42 — supported tools

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Siemens MS42 engine ECU with confirmed AutoTuner support via OBD. MCU variants: C167 (29F400). Reading and writing follow the protocol scope; match the ECU identification to a supported variant before use.

Last changed: 2026-10-31 · Card revision 2

Compatibility depends on ECU HW/SW, protocol and active licence. A tool missing from this list does not imply lack of support.

Tool

Connection

Operations

Scope and notes

AutoTuner

OBD

Read (type unspecified)
Write

MS42; MCU variant C167 (29F400)

Reading and writing. Scope covers AutoTuner-supported applications for the specified variant.

CMDFlash

OBD

Operations unspecified

MS42; BMW SERIE 3; 320I SIEMENS MS42 KLINE; BMW SERIE 3; 323I SIEMENS MS42 KLINE; BMW SERIE 3; 328I SIEMENS MS42 KLINE; BMW SERIE 5; 320I SIEMENS MS42 KLINE; BMW SERIE 5; 328I SIEMENS MS42 KLINE; BMW SERIE Z3; 320I SIEMENS MS42 KLINE; BMW SERIE Z3; 325I SIEMENS MS42 KLINE; BMW SERIE Z3; 328I SIEMENS MS42 KLINE

Mode compatibility confirmed by the official CMDFlash list. The corresponding protocol package is required; match functions and ECU variant in CMDFlash software.

DFOX

OBD

Read (type unspecified)
Write

BMW 3 Series (E46) 2.0/2.3/2.5/2.8/3.0/3.2l; BMW 5 Series (E39) 2.0/2.3/2.5/2.8/3.0/3.2l; BMW 7 Series (E38) 3.0l; BMW Z3 Roadster 2.0/2.5/2.8l; MS42

Operations confirmed in the DFOX list for the specified application and variant. Updates published since October 2025 require DFOX V2 software.

Pinout Bench

No Bench pinout has been added.

Pinout Boot

No Boot pinout has been added.

Update history

Revision 2 · 2026-10-31
Revision 1 · 2026-10-31