- Clogged Drain Plugs: On the floorboard, there are drain plugs that allow water to exit. If these drain plugs become blocked, water can accumulate and cause the floorboard to become wet.
- Damaged Seals: If the seals around the doors, windows, or windshield become damaged, water can leak into the vehicle and cause the floorboard to become wet.
- Heater Core Leak: If the heater core develops a leak, coolant can leak onto the passenger side floorboard and make it damp or even wet.
- Sunroof Leak: If the vehicle has a sunroof, a clogged sunroof drain can cause water to leak into the vehicle. This leakage could affect the floorboard area.
- Air Conditioning Condenser Drain: If this gets blocked, water can build up and drain into the footwell area.
- Windshield Wipers: Make sure the windshield wipers are not damaged or clogged, and that they properly clear water from the windshield to avoid water from leaking into the car.
