Recently bought a used 2004 Mazda MPV-ES with 143k miles. Great ride and has been impeccably maintained by the 2 previous owners.
Recently "something" behind the glove box began making a loud, rapid clicking noise while the ignition is on and it only stops when I unplug the sensor connection attached to a plastic gray/white "box".

Trying to figure out WHAT the "box" is WHY it's making this noise?? Here's the sticker on it.
​​​​​​​


Parts label on the "plastic box"

 

Looks like the fresh air / recirculated air flap actuator.