Siemens SDI4 ECU Tuning
Engine control unit used in 1 supported model from 1 make.
Porsche with the Siemens SDI4
All Porsche tunes- Porsche Cayenne2007+957 · 4.8 V8, 4.8 V8 GTS, 4.8 V8 TurboAutoTuner
About Siemens SDI4 tuning
The Siemens SDI4 engine control unit is supported in 1 model from Porsche. 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.