No it can't be that then as it leaks only when we pour water into that drain hole by the wipers. I know the AC will give off water, but the air con would only be working in the morning when we defrost.

 

I see that I have no location in my profile, I'll figure out how to add that, we live on Vancouver Island so similar climate to Seattle, very dry and warm non humid summers. So only ac for the defrost at this time of the year. We do get water dripping under the car in the summer from the ac, but never into the car. As I keep on saying that it only leaked a bit after recent rain and now when we carefully pour water on to the drain hole down by the wipers. That must go to a hose and maybe that is the one that is leaking.

 

Have a look on your firewall underneath you scuttle panel, take your wipers off as well and see if not only are the drain holes for that area unblocked but check your heater vent. As an auto glazier with 30 years under my belt, yes old as dirt hahaha, I have seen this so many times!!!

 

CAUTION: if you need to go this far then I recommend that you not do this checking if your Mazda is still under warranty.
I should also suggest that if that area was if fact contaminated to the point of leaking, then the cause was not likely by a manufacturing defect. That are actually only has a very small area for the intake of ram, or air to supply the HVAC system. If you were in a flood, then it could be possible to have caused that area to be the fault but then you would have a lot more serious problem to contend with.
The actual wiper transmission cover will prevent most debris from getting into the HVAC area that also many platforms now have a cabin filter that will catch debris but not water. So, if that area were contaminated with water the cabin filter would also be wet. A cabin filter on most Mazda now is easy to access and check for both its general condition and for water or moisture.

 

Yes that does seem like a big job, so I would not do that as it is under warranty. I think I'll take a chance with it being debris as we don't get much in there where we park. I might see if the glove box comes off easily. Thanks for all the advice.

 

Its not a big job and simple hand tools and very little or basic DIY skills needed. For a DIY about 45 minute job. But I will advise that you should at least have Mazda look at this. This way if they find nothing the service will be noted on your permanent VIN record should in the future a problem arises from that area or somewhere else even out of warranty. (up to a point)

 

Yes I used to take it off on our Mazda 6, I would assume it to be no more difficult. I would be very surprised if whatever is above the drip is caused by a plug as the drain hole is very tiny. Do you think that hole drips into that chamber that can be seen in your last picture above, or is there a tube that goes out side? I'll see what they say tomorrow !

 

Do you have sunroof. There are drain holes in the roof corners. open roof and get a cable tie and poke down into holes. back ones are hard to get too. then flush with some water.

 

Not sure why some keep saying the sun roof without knowing how the drains work and where they go. On this model Mazda it would not be on the passenger side and where the OP said the water was.
Maybe look at a Factory service guide illustration to see on a specific model where sunroof drain holes and tubes go.
Never poke a cable down a sunroof drain hole unless your intent is to damage it and then you would have a leak.
I should also mention that when the sunroof is closed there is no water to drain unless you are one that leaves it open when you wash your car or when it does rain outside??

 

We have no sunroof! The water seems to only drip inside when water is poured into the drain hole in front of the windshield. We were wondering that if it were debris getting through that tiny hole . it would have to be really tiny. The only thing we thought it could be was the pollen that comes down in the spring and summer. It gets quite gummy and sticky when it gets wet. A bit of rain sloshing that stuff down into the drain, then the drain and then drying out, could maybe block it up? A long shot, but I poured a couple of watering cans of warm water down into just that drain hole. Well , it may have worked ! WE put the hose on to the front of the car for a while and nothing came through, and there is nothing that we can feel sitting on top of the panel that sits directly below the area where it leaks . Here's hoping !