Update:
Supercharger (compressor) replaced by Mazda dealer. 4 hour job. Part number different to original so assume a modified version.
Drove home by long route to ensure engine well up to temperature, and that supercharger & supercharger clutch as warm as when previously groaning. No groaning heard. So, tentatively, the supercharger replacement seems to have solved the issue, although cannot test extensively at the moment due to lockdown.
The CX-30 is a real pleasure to drive, if this is the only problem to emerge then I will be well pleased.
Supercharger (compressor) replaced by Mazda dealer. 4 hour job. Part number different to original so assume a modified version.
Drove home by long route to ensure engine well up to temperature, and that supercharger & supercharger clutch as warm as when previously groaning. No groaning heard. So, tentatively, the supercharger replacement seems to have solved the issue, although cannot test extensively at the moment due to lockdown.
The CX-30 is a real pleasure to drive, if this is the only problem to emerge then I will be well pleased.