What is this
#2
It's an in-car air temperature sensor to measure the temperature inside the passenger compartment. The signal from the sensor is used by the HVAC system to regulate incar temperature by controlling the discharge temperature control, temperature door control, blower motor level control, and A/C auto control. I think it's only used with the automatic HVAC system and not the manual system you have. I guess Hyundai chose not to make 2 different fascias for the dash.