What are These on the Bottom of my Doors?

[reMarkable]

(See attached pics from bottom of passenger front door)
Maybe these are now a common items on newer vehicles - but I don't recognize these things found on the inside, bottom of the front doors - the white plastic item with what looks like a black flap over it. Can someone tell me what they are? Are they a switch of some kind? I'm just curious.

Thanks!

[5phreak]

i wonder the same thing every time i towel dry the car after a washing

[njaremka]

they are the drain holes. they have that little flap on them to make sure water can come out, but not come back in.

[reMarkable]

Thanks njaremka.

Do you know if this is this a new standard item on cars - or some unique Mazda design?

[njaremka]

i dont know if they are standard on any other car, and i dont think they are new either - my 2001 protege has the exact same things on the door.

[5phreak]

huh. interesting. thanks.

[rweatherford]

Lets water out of the door, keeps dirt and dust from getting inside the door. (hopefully)

[offset_98]

careful though...I've snagged one with a towel and now it won't go back in. Not worried though.

[fam]

They are mostly standard on every car ive seen, Mazda's look a little different (a bit more fragile) but they all have the (supposed) one way drain plugs.

[major error]

on much older cars, they weren't so fancy--just a small drain hole. It was usually the starting point for door rot...

on another note (pun intended) those flaps are also fingered as a potential source of buzzing when playing loud music...