2007 Ford Mustang Coupe Logo
Posted on Mar 04, 2014

Mustang water leaking on passenger side floor.

Water pours out of the dash area onto the passenger side floor after a rain storm.

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Allen Elwood

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  • Posted on Sep 14, 2021
Allen Elwood
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It's a clogged flapper valve, see this video on how to fix it in 5 minutes with two screws.....
https://www.youtube.com/watch?v=iFapgCIsWwI

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  • Posted on Oct 10, 2014
Trudy Guldin
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I have 2005 mustang and had the same problem 4 yrs after I bought my .Mustang when it was still under the warranty I took it to the dealer where I purchased vehicle.They charged me $150.00 to change the cabin air filter they said the old one was blocked with leaves and suggested not to park vehicle under trees which is kind of hard to do when I live on a street with a lot of trees. Everything was fine until 2 years later it started leaking in passenger side again.Pulled cabin air filter saw no leaves.Of course now warranty ran out .I went on a mustang web forum to find there were other people with same problem and not just a mustang problem there were other makes and models having same problems .One person fixed the problem. Here is the fix. Pop your hood look under where the cowl grill sits on the right and left side there is a rubber drain on each side( hard to see)so feel with your fingers check to see if they are blocked with dirt or leaves if so clean them so water can flow through them when it rains .That is what was causing water to come in on my passenger side right underneath the glove box in my mustang now every few months I check to see if they are blocked I have not had anymore problems with water coming in on passenger side . Sad thing is when i purchased my mustang i wish the dealer would have told me not to park my car under trees so i wouldn\'t have a water I would have thought twice about buying a car that you can\'t park under trees because I live in an area where there is a whole lot of trees.Thanks a lot Ford for designing such a crappy car !!!! Good luck I hope this fixes your water problem.

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5 Related Answers

Anonymous

  • 91 Answers
  • Posted on Aug 14, 2008

SOURCE: water in floorboard

Either the sealant that was used in putting your windshield in has began to fail, or there may be a larger opening under the vents, or on the firewall in the engine compartment. Look under the vent slats/holes under the windshield wipers. Look in the bulkhead that separates the engine from the dashboard(With the hood up). Those are the only ways water is getting in. Seal it with an expanding style sealer

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Anonymous

  • 396 Answers
  • Posted on Oct 10, 2009

SOURCE: 2001, rain water comes onto the passenger side

Are you sure it's rain water and not coolant? Coolant would have a distinct smell.

Does the car have a sunroof? The drainage tubes on sunroofs can get stopped up and allow water to enter the car.

Anonymous

  • 388 Answers
  • Posted on Oct 14, 2009

SOURCE: driver side floor water leak

Well, you are on the right path; the rubber seal around the windshield could indeed be deteriorating...what may be happening is the water is coming through the cowling and pooling up on the seal there...as the water sits, the seal deteriorates and eventually you will see water like you are now.

My recommendation to you is to take your Edge to a shop and ask them to look for a leak at the bottom seal of the windshield.

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Atyourdoor

Quinn Texada

  • 93 Answers
  • Posted on Jan 23, 2010

SOURCE: 2006 mustang water leaking rear floor

Hi , Its leaking water on the passenger rear floor? It could be the heater core leaking and running down the floor board to the rear of the vehical. Do you smell antifreez or see moisture build up on the windshield ? does the car seem more "humid" inside?

gordanddar

gord storey

  • 477 Answers
  • Posted on Feb 16, 2011

SOURCE: My 2006 Mustang recently had

Most cars have a void underneath ( inside ) where the wiper arms come out. It catches rain water off the windshield so that it doesn't run down the firewall inside the engine compartment where there could be some electrical stuff. There will always be a drain hose to drain that area , which can become pluged up with leaves etc. over time. If you can look around under the car , and possibly in the wheel well , you might find the other end of that drain hose. A quick shot of water at the car wash , backwards up the hose , is often enough to clear the drain. Otherwise you might have to open it up and clean it out. If that area became full of water , there are lots of places where it could leak through the firewall and into the car.
Of course , if the water is actually engine coolant , then I would say your heater core has a leak.

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