Kimberly, I am not real familiar your with your car, but this should work for any make. Have a friend sit in the passenger seat while you use a garden hose to put water on the car. Use a direct stream and start by spraying into the vents that are right by your windshield wipers, then work your way up and around the edges of the windshield. If no water, lift the hood and spray water on the firewall on the passenger side while your friend looks under the dash. Your friend should be able to see where the leak is and how water is getting into the car. My guess is A) your windshield seal has a leak letting water get in or B) there is a leak somewhere around the heater core or some area on the firewall. I guess the last thought would be, does the floor on the passenger side have a hole or has it rusted through so water splashes up and soaks into the carpet?