doritofeet

2004 GX470 117k. Has anybody experienced water intrusion into the rear driver side interior panels? The car is brand new to me and i noticed staining on the seatbelt indicating an ongoing problem. We just had our first big rain of the season in south florida and the seat belt and floor board are very wet on the driver side, back seat(not 3rd row). I checked the condition of the 3rd row hatch window seal and it's perfect. there's no obvious damage or cracking to any exterior weather stripping. It seems the leak would have have to be rather high up in or above the C-Pillar to saturate the seatbelt, itself. Roof rack seals? Rear A/C duct condensation? Any help would be much appreciated. I'm looking for a OEM part solution rather than something involving silicone Thanks!