2015 FIT MT and I had about a 1/8th inch of water pooled in my spare tire well. I’m coming from a GD where you had obvious cracked seam sealer at the top of the hatch.

has any other GK owner experienced this? Anywhere I could try and add seam sealer? I didn’t see any obvious spots for water ingress on my GK hatch.

 

I'd start with looking at tracing of water then if no definitive evidence is found start at the spoiler. Lot of possibilities here and did notice a chance of my spoiler to leak after I took it out.

 

The stock foam tail light gaskets are well known to go bad on almost all Honda's after a few years. They dry out, and flatten out, then letting the water by and dropping down to the floor. That was the case for our 3rd gen Fit. You will also see moisture build up in the taillight itself. Start there.

 

Thank you for the suggestions!

I'm guessing the headlight gaskets, there should be an access door in the plastic trim for changing bulbs and I can look in there.

What about the spoiler? I don't actually want to remove the spoiler if I can avoid it. How does it leak through the spoiler? Like in the gap between the spoiler and the actual tailgate? I would think this would be from the actual tailgate gasket unless it is leaking through the spoiler bolts...

 

I had water in my spare tire well when I brought it home from the dealership brand new. My guess was that when cleaning it up in prep for my pickup someone had used a powerful pressure washer on it and water was forced in somewhere, probably through the gaskets around the hatch gaskets. I wrote it off as a one time thing - never had water in there ever again. I was never able to figure out exactly where it got in.

 

seeing as the used car dealer was an idiot (installed the wheels on backwards, opposite of rotation direction) I’m hoping this is the case. The spare tire well looked perfectly clean without a spot of rust so hopefully this was a spray wash as you said. I noticed that the gap between the liftgate and the taillights is huge, like almost a quarter inch.

 

In the trunk area, when I did my sound deadening, I recall removing some round plastic plugs that you can see the roadway when removed.