1. Power (Yellow/Blue)
2. Ground (Black/Green)
3. MAF Signal (Red/Blue)
4. Temp Signal (Yellow/Blue)
5. Ground (Yellow/Green)
http://i193.photobucket.com/albums/z151/Legacy_NSFW/Intake/MAF.jpg
Sorry to reopen an old thread but I found it through a Google Search because I am using a Suby MAF Sensor for my Nissan Altima Turbo.
Are these listing the same for the 2012+ Imprezas? And are the MAF sensors the same between the STi and WRX's? I bought a 2012 STi MAF Sens0r