Denso SH12 ECU Tuning
Engine control unit used in 3 supported models from 1 make.
Mazda with the Denso SH12
All Mazda tunes- Mazda CX-52012+2.2 Skyactiv-DAutoTuner
- Mazda Mazda 32013+2.2 Skyactiv-DAutoTuner
- Mazda Mazda 62013+2.2 Skyactiv-DAutoTuner
About Denso SH12 tuning
The Denso SH12 engine control unit is supported in 3 models from Mazda. 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.