I have a leak at the driver side front onto the floor. This is a right hand drive model. It only happens when car is parrked in the rain. It is so much that a puddle of water forms at the front and back seat. The car does not have a sunroof. Thanks

leaking when it rains --if or when a/c on --or all the time ----rain check trunk -door--window seals --a/c condensation drain clog all the time heater core hose

You don't way what type of vehicle you are driving. I will assume it has a sun or moon roof. Most of these have drain lines that run down inside the driver's side door pillar and exit through the floor pan onto the ground. Over time, these drain hoses dry out and shrink, often retracting into the drivers side kick panel. Then, all the rain water that drains from the sunroof will leak out onto the drivers side floor. If that is the case, you will need to remove the drivers side kick panel and repair or replace the drain line and reroute it through the exit hole in the floor pan.

Get your heater core checked. May be leaking.

heater core?

several qs. What year make and model is the car? Is car level when water fills floor? Does it always happen every time it rains fairly heavily? Is the trunk always dry? Talk to other owners for their experience.

bad windshield gasket.you could take it to youre mechanic and have it replaced .

it is probably coming in through the firewall some where after being splashed up by the wheels check behind and above the left front wheel for holes

Could be a plugged drain for the windshield or cowl vents, or the door gasket.
You could try using a garden hose or take it to a body shop.

I had the same problem with a 1994 Taurus. Within the front fender was 10 years of pine needles and leaves blocking the drain backing the water up in and over the fire wall and into the front passenger seat floor.
I took a LONG pair of needle nose pliers threw the passenger side door, and was able to remove enough debree. After pulling out out about 5 fist full's of yuck, 1 gallon a water that was stuck some where poured out flushing out the drain. I did the same on the drivers side. After that I had no problems with floods. I hope this helps. If not check your back door weather stripping if you have one. I have heard water leaking behind the passengers seatbelt and onto the floor from under the seat. Got to love Florida's rain season(s)

If you have a wet seat then it is likely defective weather stripping around the window.

Try this. If the floor is dry, then it rains and the floor remains dry, only gets wet after a drive in the rain or on wet streets, you may have a hole somewhere.

Check for holes from missing rubber grommets or holes in the floorboard or firewall from rust. Check for any rust holes or missing rubber grommets under the car or on the firewall, anywhere water can splash up into the vehicle from driving in rain or running through puddles..

Check wet spots along the carpeting all the way up under the dash, if the wet spot is higher than the floor itself, you could be getting the water from splashing through puddles.

Any holes under the car or in the fenderwell even up on the firewall can cause this problem.

First check for any obvious signs of rust, if none are found then look for missing or defective rubber grommets.