Siemens SIM32 ECU Tuning

Engine control unit used in 6 supported models from 1 make.

Renault with the Siemens SIM32

About Siemens SIM32 tuning

The Siemens SIM32 engine control unit is supported in 6 models from Renault. 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.

Browse all supported ECUs and TCUs

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.