The first thing to do while you are dealing with G35 sedans and 350Z models between 2003-2006 as well as all G35 coupes is disconnect the air intake duct from the MAF/IAT sensor and from the air intake resonator, afterwards pull it out. To do this, depress the release tab that is located at the back of the electrical connector for MAF/IAT sensor. Take off also an air filter housing cover. It should be noted that you will have to remove four bolts when pulling out a MAF/IAT sensor from an air filter housing cover (1984). In case of removal, installation takes place in a reverse order. In case of 2007 and subsequent G35 sedans and 350Z models, you can unplug electric connector from MAF/IAT sensor. Then remove a bolt attaching MAF/IAT sensor and get it out of an air filter housing cover Finally, installation is the reverse of removal.