Hello there, I am a Master Automobile Technician certified by Honda and ASE. I can help you with the problem you are having with your Honda!

I consider myself pretty good at finding water leaks but they can get pretty tricky quite quickly. There are some simple quick checks you can do. First, let me say that just because you have water in one area, that does not mean it is coming in at that area. Water can easily travel along body/trim panels and to the floor under carpets etc.

There are four drain tubes at the four corners of the sunroof frame/gutter system. Have you ensured that all four corners are draining? If even one of these drains are backing up and especially if the vehicle is parked on an incline then the gutter can overflow onto your headliner which channels it to the plastic side trim in your car and down to the carpet

I would also make sure the drain tube for the A/C evaporator case is draining freely. Run your a/c for a while and see if you have water dripping out towards the front middle of the vehicle.

Have you had a windshield replaced which could be leaking?

I have fixed a lot of water leaks and consider myself pretty good at them but they can get quite tricky. Sometimes the vehicle needs to be on an incline for water to come in/ Sometimes there needs to be a blowing force such as driving down the road in the rain.

I have also seen doors leak water onto the door sill trim which then trickles into the car. This happens when the vapor barrier behind the door panel becomes compromised(torn, unglued, etc.). Have you had any work done in the doors such as window or lock/latch repairs?

If quick checks of the sunroof & A/C drain don't reveal anything then that usually means it's time to start removing carpet and interior trim so you can see exactly where the water is coming in. All the panels, headliner, and carpet can make it impossible to see where the water is entering.

You can also look for signs of water such as rust which can lead you to the affected area

Do you park on an incline?

Doors could still be leaking due to age and failure of the glue holding the vapor barrier to the door.

Ok, at this point then its time to start removing things to see where the water is coming in. Here is where patience and time are needed to find the source. If it were me, I'd start by removing the plastic trim and door panel at the driver's front. It would also be beneficial to remove the carpet and seats. At minimum remove at least the driver's seat and pull back that section of carpet. You will then need to dry everything up and run the hose over the car and see if water shows up. with the carpet removed/pulled back it will be a lot easier to trace the water. Otherwise the carpet is like a sponge wicking the water and making it impossible to see where the wate is originating.

Hey, just wanted to check in to see how it was going. Let me know what I can do to assist because I am here to help until we get this figured out. Fixing this for you is my goal.

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