How often does the pollen filter in a Nissan Note N-Tec 1.4 need changing?

How often does the pollen filter in a Nissan Note N-Tec 1.4 need changing?
Every year if you want a decent supply of fresh air in the cabin of the car. If it isn't changed often enough, it will be trying to pull air through a blocked vent and cause the heater fan resistor to overheat and fail.
Answered by Honest John on

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