Siemens SID203 ECU Tuning
Engine control unit used in 2 supported models from 1 make.
Land Rover with the Siemens SID203
All Land Rover tunes- Land Rover Range Rover2002+L322 · 3.6 TDV8AutoTuner
- Land Rover Range Rover Sport2005+L320 · 3.6 TDV8AutoTuner
About Siemens SID203 tuning
The Siemens SID203 engine control unit is supported in 2 models from Land Rover. 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.