Motor and impeller of the heater fan with fasteners
1 - washer; 2 - motor; 3 - fan; 4 - nut
1. Disconnect the negative cable from the battery.
2. Disconnect the motor wiring and ventilation tube.
3. Loosen the mounting screws and remove the motor from the air duct.
Installation is carried out in reverse order.
The article was copied from here (NissanBook)