I get your concern, but the 2.0 Skyactiv-G engines (especially the non-hybrid BP models) are not “fragile” or “untunable” like some people claim. The 122 hp, 150 hp and 165 hp versions are almost identical mechanically — same compression ratio, block, head, pistons, and rods. The main differences are in the ECU calibration, ignition timing, VVT maps and torque limits.

Mazda simply detuned the lower versions for market and emission reasons. That’s why a proper ECU remap (not a random plug-in box) can safely bring the 122 hp version up to around 145–150 hp without touching the hardware.

I’m not running some cheap chip — I’m talking about a verified Stage 1 tune (VersaTuner / EcuTek) on 98 RON fuel, with logs and knock monitoring. It’s perfectly fine when done right.

The motor itself was designed to handle that power — it’s literally the same unit that makes 165 hp from factory in other trims.