Siemens MSS70 ECU Tuning
Engine control unit used in 7 supported models from 1 make.
BMW with the Siemens MSS70
All BMW tunes- BMW 1-serie2007+E81-E87-LCI · 30iAutoTuner
- BMW 3-serie2005+E90, E92, E93 · 30iAutoTuner
- BMW 5-serie2003+E60 · 30iAutoTuner
- BMW 6-serie2004+E63 · 30iAutoTuner
- BMW 7-serie2001+E65-E66 · 30iAutoTuner
- BMW M32000+E46 · 3.2i (M)AutoTuner
- BMW Z42002+E85-E86, E89 · 3.2i (M), 30iAutoTuner
About Siemens MSS70 tuning
The Siemens MSS70 engine control unit is supported in 7 models from BMW. We read, modify, and flash it with AutoTuner, then verify the result on our Dynojet 424xLC2 in Jenison, MI. A custom calibration optimizes fueling, ignition timing, boost, and torque limits for your exact build.
Don't See Your Vehicle?
These lists cover off-the-shelf tuning platforms. We also do standalone ECU installs and custom calibrations, so reach out and we'll tell you what's possible for your build. Compatibility data last updated 2026-09-24.