[So Good F30]

I am experiencing water in the rear back passenger seat during heavy rain. i cleaned out the rain channels on the roof and in the truck area. i cant really tell where its coming from.

[dmaxdmax]

Maybe through your antenna and the upper brake light panel? If you mean 'on the seat.'

Another possibility might be from the rear sunroof drain down the c-pillar somehow.

If you need to tear apart anything newtis.info is too helpful!

BTW, had you had any work done on the roof...like a wrap or something where they'd removed the sharkfin?

[ggrcrash]

Check seal around sunroof, those were known to go bad before...probably due to dry rot, if your car is kept outside a lot. Salt degrades the seal too...

[So Good F30]

Im getting water on the floor of the rear passenger seat. There's no sign of water coming from other places. Its a large amount of water. its not wet on the sides or headliner, nothing anywhere else it just some how pools up in the rear passenger.

[zatelli]

Originally Posted by So Good F30

Im getting water on the floor of the rear passenger seat. There's no sign of water coming from other places. Its a large amount of water. its not wet on the sides or headliner, nothing anywhere else it just some how pools up in the rear passenger.

Maybe you should check your A/C evacuator drain, it might have gotten clogged. (there is AC right behind the armrest).
I hope it helps and you get this fixed asap, as if left unchecked, this issue could lead to rust / corrosion.
Please provide further details, such as where on the rear floor area, you've noticed water damage (if it's close to the sides, it could be damaged weatherstripping, if closer to the middle area, I'd have the A/C drain checked.

[Astute]

Replaced the vapor barrier in my passenger doors, front and rear a few weeks ago due to a similar problem. Check the sunroof drain and the vapor barriers.