I could be wrong on this, but after having a nasty encounter with a deer several years ago I was told that the ambient temperature sensor on US spec cars was in the passenger side rear view mirror and that there was no temperature sensor in the driver side mirror. Is it possible that the two sensors have to do with left hand versus right drive models? I'm just guessing. Or perhaps these are position sensors for automatic mirror adjustments and not the temperature?
03 XC70 OSD (Traded-in 4/12)
05 AWD S80 OSD (Transferred to son)
12 XC70 T6
16 S60 T5 Drive-E (FWD)