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Thanks for the update.

I think if it's just the resistor, it would still blow on max/high. Affects the lower speeds.

You're sure it's the motor and not the resistor?

https://micra-forum.com/showthread.php/2382-DIY-Blower-Motor-Resistor-replacement-(with-pics)

Also: what about a used blower motor from a junkyard?

See if the part number for the Micra and Versa is the same - often you can do that by searching the part for both cars on a site like rockauto.com