Wet Floorboards on passenger side, already attempted fix
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Joined: Jul 2021
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Q40 which is a rebadged g37
I'm guessing it's a very similar setup to the G35, start by removing the battery, then put a garden hose on the windshield and run water so you can see if it's pooling up in the battery box instead of draining out the bottom. You want the water turned up fairly high for this.
There is no cowl on the G35, it's a cowl-less design, the water drains out from a drain in the bottom of the battery box. What people refer to as the "cowl drains" is the screen/mesh material on that plastic cover over the wiper motor assembly. If those drains plug up the water pools up and pours right onto the top of the IPDM. If the battery box drain plugs up the whole thing fills up with water and submerges the IPDM as well as possibly draining into the cabin.
You can check your sunroof drains by setting the garden hose on the top of the car, the water should trickle out from a small hole on the A pillar right about level with where the wiper cover is
There is no cowl on the G35, it's a cowl-less design, the water drains out from a drain in the bottom of the battery box. What people refer to as the "cowl drains" is the screen/mesh material on that plastic cover over the wiper motor assembly. If those drains plug up the water pools up and pours right onto the top of the IPDM. If the battery box drain plugs up the whole thing fills up with water and submerges the IPDM as well as possibly draining into the cabin.
You can check your sunroof drains by setting the garden hose on the top of the car, the water should trickle out from a small hole on the A pillar right about level with where the wiper cover is
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Joined: Oct 2020
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base 04 sedan and 07 sport sedan
I had this pop up a couple weeks ago as well. The water was seeping passed the gasket on the sunroof drain grommet through the opening where the clips on the side snap into the firewall. Used some gasket sealant on it and stopped that leak. Now I've noticed the AC drain is sweating enough there is some condensation collecting in roughly the same place under the carpet. Not enough to wet the carpet, but enough to notice since I've been watching it like a hawk. It drains fine so not sure what if anything can be done for this new issue
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