You don't need to change your Air Mass Sensor in first place..................All you need to do is replace the Air Filter and look for a option in replacement parts and reset the Air Filter Values and clear your fault code and you should be fine to go mate.............The ECU is sensing low air flow from the air mass meter because of your dirty air filter................And just in case your air mass was faulty and you need to change than there is also an option for reset air mass value which you will need to reset to get the air mass fault code clear........Good Luck

It should be in the same place where you found the Air Filter Reset Option..............Or in Component (Parts) Replacement.........