Siemens SID201 ECU Tuning
Engine control unit used in 5 supported models from 3 makes.
Citroen with the Siemens SID201
All Citroen tunes- Citroen C52001+2.7 HDIAutoTuner
- Citroen C62005+2.7 HDIAutoTuner
Land Rover with the Siemens SID201
All Land Rover tunes- Land Rover Discovery2004+III, IV · 2.7 TDV6AutoTuner
Peugeot with the Siemens SID201
All Peugeot tunes- Peugeot 4072007+2.7 HDIAutoTuner
- Peugeot 6072000+2.7 HDIAutoTuner
About Siemens SID201 tuning
The Siemens SID201 engine control unit is supported in 5 models from Citroen, Land Rover, Peugeot. 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.