Breather inlet is a heater, not a sensor. There is a lot of water vapor in the blowby gasses, in colder temperatures it can freeze and block the breather, or it can shed ice into the turbo. Factory just has 12V going to it at all times. Plenty of people will say you don't need it but if you drive at all below freezing and you've already got it then you might as well run it.
Get a bead blaster gun and use glass bead....Epoxy prime and paint....GB
...BTW your Bieber avatar is awesome.-Malone