Have you tried the motor unbolted from the car? Reason I ask is somebody from my old club ran a brushless motor in an M03 chassis on the standard mount with the standard screws and the screws hit the fan inside the motor and jamed it solid!
Can you turn the motor over with the wheels of the car?
The other thing to try is the sensor lead, if it's that spinning the wheels should allow it to start (most of the time) but it won't be able to start from fully stopped on it's own.
I hav eused Speed Passion motors with HobbyWing ESCs so no underlying problems there.
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