Ext. Lancia Musa Sensor

Good morning to all and happy holidays.

For some time I am having a problem with the outdoor temperature sensor of my wife's muse and is that it marks between 10 and 12 degrees less than the real temperature, when it has always marked a fairly approximate temperature.
I have tried to locate the blissful sensor and I can't find it, as I could read in forums, said sensor can be located in the mirrors, on the front grid, in the fin, but ....... I can't find it. Can Alguein take a hand?

Thanks in advance and what happy holidays said