I am troubleshooting water leak intrusion point, after elimination of points like windshield, door seal, door grommet, cowl air intake the likely intrusion area is behind fender.
the water flowing out of cowl through the flapper drips between fender and firewall body. against the firewall body in that space I notice there is a fibrous material. I suspect water leaking through that area. Has anyone faced water intrusion in that area? any guidance on how I can further troubleshoot the behind fender area leak.
attached picture for referencing the area of suspect, showing the water flowing out of cowl between fender and firewall body

the water flowing out of cowl through the flapper drips between fender and firewall body. against the firewall body in that space I notice there is a fibrous material. I suspect water leaking through that area. Has anyone faced water intrusion in that area? any guidance on how I can further troubleshoot the behind fender area leak.
attached picture for referencing the area of suspect, showing the water flowing out of cowl between fender and firewall body

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