Question about 2002 Nissan Altima

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Nissan Altima Water Leak

My 2009 Nissan Altima has a water leak on the passenger side. It's not a clogged air filter or hose because it takes water on when the car is turned off and just sitting there while it's raining. We've tried running water on it while someone lays on the floor looking for water and can't find the source. The Nissan dealer says they farm this work out to a water doctor and that the repair might not be under warranty. Car's never been in an accident. Can anyone offer advice?

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I also have a 2009 Nissan Altima and after sitting or driving in the rain the entire back floorboards are soaked. I took it in last year and supposedly they replaced a "plug". Unfortunately the repair was done at the end of the rainy season so everything seemed to be okay. Fast forward to this seasons first real rain and again soaked floorboards. I went back to the dealership very frustrated with the whole situation. This time they had had my car for 4days and I was told that the HVAC box was leaking due to a clogged line. The line was cleared and sealants used on certain areas. The service advisor is confident that this will take care of my problem. I'm not so confident since my HVAC system was not in use when the car was just sitting there filling up with water. Wish me luck. I am curious how many 2009 Altima's are having this problem and if Nissan is just trying to avoid some sort of recall notification. Very dissapointed 1st time Nissan owner.

Posted on Nov 12, 2010

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  • tcdalton58 Jan 26, 2011

    I also have a 2009 Nissan Altima and it has been leaking in the back floorboard for almost 1 year. I have had it in several times and the water doctor also tried to fix it but still leaks. I am so upset because i purchased this car new and it has been in the shop so much for the water leak, not to mention the smell of mold and dampness in the car. i am working with a lawyer trying to get nissan to buy my car back under the lemon law.

  • gpress Aug 10, 2011

    I have a 2008 Nissan Altima and the floor boards in the back seat have been wet on the driver's side. After doing some research, I sat in the car while my husband ran the hose over the windows and sun roof. It turns out that the water is coming in through the panel above the window. Did a little more research and it turns out that the drainage hoses from the corners of the sunroof are either not connected or are clogged. Going to continue researching, but we need to get nissan to fix. My car is out of warranty, so it will be on me. Ugh!!

  • wfdix1
    wfdix1 Sep 20, 2012

    My wife has a 2009 Nissan Altima with a sunroof. Seems like everytime it rains she comes out to find 1/2 inch of water. The Nissan shop can't find the problem.

  • Carla Nation Jan 10, 2019

    My 2010 Nissan leaks on passenger side. Where the plastic piece is jointed with liner. All 4 drain holes are open. Recently had to have ac system replaced to the tube of $1200. Any advise. We can see it physically leaking there


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As a former certified nissan service advisor, i would say that if it has a parts defect then there is no way that it will nat be covered under warranty. I have seen the sunroof drain on several cars be kinked at the lower end near the kick panel. try opening the sunroof and pouring a small amount of water in the drain hole at the corner of the opening. Also, i have seen where the insulation for the door wiring harness soaks up water then spills out onto the carpet. as long as you are under the 36k mile mark and have not been in an accident, then this is absolutely a warranty repair. if th dealer will not fix it then try another dealer or ask for the regional service rep.

Posted on May 02, 2010

  • Vahid Osmanovic
    Vahid Osmanovic Mar 31, 2014

    i have a 2003 nissan altima with no sunroof and it dose the same thing


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Do you have sunroof? Well here are drain lines that run down the pillar to the fender and out. Chances are the drain or tube is clogged/pinched and it is backflowing into your headliner (yikes!).

So for those still seeking, here is the fix: 1. Remove the column cover and you can then see the drain tube. As it is clear, you can see if it is full or not. It should not be full. Dont yank on it or it will disconnect and totally drain into your dash. 2. Wipe up under the fender nearest the door and underneath. Now go back to column and unclip for the lowest clamp and gently move it around and pinch tube until it drains, you can see it draining to the ground if the hose is connected correctly. Put cover on and try not to pinch tube.This can happen when installing a dash cam power line. 3. Now you can leave it there and that should be fine, but you can get into it by removing the tire and the wheel skit and visually inspecting the hose. It has to bend so it can naturally pinch there. You could cut the line and put in metal 90 degree bend or try cutting and inserting a stint. Anyways, the bug or whatever is clogging the sunroof drain is most likely there.

Whatever you do, do NOT let the car mildew. Dry it out.

Posted on Feb 20, 2017

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