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Dodge-Plymouth Neon: Water Leak

neonnutneonnut Posts: 1
I have a 98 Neon 4dr. The other day I noticed that the carpet in the back seat areas was soaking wet. I had been driving in rain along the interstate, but did not drive through any standing water. Where could the water be coming from?


  • dude7dude7 Posts: 1
    Your rear taillights are leking and filling your trunk with water , I've been fighting this for a year and still can't fix it!good luck!
  • The rear floorboards in my Daughters 2001 Neon get wet (really wet) when it rains. This happens when it's parked. She first noticed it on the drivers side, I thought she had left a window cracked open, not so. It quit. However last month she finds the right side is now leaking. Anyone have a similar problem, or advice?
  • It is probably the taillights. I'm not sure exactly where because mine isn't fixed all the way yet, but check for leaks in that area. I'm sure the well for the spare tire flooded too...
  • Thanks I'll take a look. Does yours get wet when it's parked as well?
  • I think it gets wet when it's parked and when it's moving... just whenever there's water. I don't get big puddles like some people have said, but it's pretty wet. It's probably just enough to make something rust :mad:
  • My 2000 Plymouth Neon was also leaking. The dealership said they typically leak through the tail lights, into the trunk, then underneath the back seat to the floor. They charged me $500 to dry the entire car out and fix the leak. I've had it back 2 days, and its raining outside, so I will know soon if its really fixed.
    Seems like this is a design flaw and should have been corrected my Plymouth/Dodge by now.
  • I have a 2001 Plymouth Neon and I have the same problem. Every time it rains there are puddles on the back floor on both sides. Just recently, I opened up my trunk and looked in the area where my spare tire is and there is a lot of water sitting in there. Now my whole trunk is not wet just inside the area where my spare tire is located. I never thought to look under there because my trunk wasn't wet...I assumed. How is your car now since you've been to the dealership?
  • I had this problem in my 1997 Neon. Take the rear lights out and reinstall with a bead of silicone sealant. You may also have to take out the rear seat and trunk carpet to let them dry.
  • Try removing the lights from the trunk. Put a nice bead of silicone sealer on the light gasket and reinstall. Once I did that my 97 trunk leak vanished.
  • Hi woodstudio! I too have a leak in my Neon and am finding a puddle of water inside the left tail light well where the wires and bulbs are. I am also sopping water up out of my tire well and have had the back floor puddled with water. My question is HOW to remove the lights from the trunk as you have suggested.

  • redpathredpath Posts: 3
    I too haave had this problem I use tuband tile clear sealant on the top edges of the tail lights just where you open up the trunk. The problem is now gone. From what I see this is a common problem for this make of car.
    RedPath :shades:
  • redpathredpath Posts: 3
    I have had more problems since fixing the leak in the tail lights to now it is some how filling up in the air-contioning/heating FAN motor unit. It rained real good for Christmas day then it was a warm nice day the next. When for a drive and water spilled out from the fan motor unit. Two days later what did not spill out onto the floor froze that night. When I went to defrost the car before leaving to work... The fan did not come on and I smelled something burning. I just had to replace the fuse to the fan and all was working again. I turned it off. That afternoon it melted I drove home from work with the heat blasting to get all the water out of the fan. I left all the windows rolled down for the rest of the day to dry up the water. I have resorted to a heavy duty work mat with 1/2 inch well in the middle to keep my floor dry. I have to pull over and bail it out every so often after a rain. I've tried to seam everything around the windows and between engine compartment to rule them out as possible culprits. Seem the vent that leads down to the fan unit has a slight leak too. Any ideas as to how I should proceed here? I do not have information in my Haines book to explain where else it could come in to run down this air vent from outside? HELP!
  • slawson2slawson2 Posts: 2
    A year and a half ago I just purchase a used 1998 plymouth neon. It had 95,000 miles on it. It was purchased just so I could get to and from the train station less than a mile away. We just had heavy rains three days ago and I am now noticing small puddles of water on the ground around the rear area of my car (gas tank area). I'll check the area where my spare tire is, but I haven't had this problem before and we have had heavy rains before. I'll also check to see if my carpets are wet. What are some other problems to my car that could occur because of water leaks? Any ideas?
  • naedrnaedr Posts: 5
    I bought my 1998 Neon new. The trunk has always been damp after a rain. During the last few months, we have found standing water in the rear floor board on the driver side and damp rear carpet on the passenger side. For those posting about adding silicone around the taillights, where does the silicone need to be placed? Any help would be appreciated.
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 44,403
    don't use silicone, it's very messy. Try LATEX black caulk, you can clean it up with water.

    You have to remove the tail light assembly to properly seal it.

    You can test for leaks by putting newspaper down in the trunk and spraying the trunk lid and tail lights. Then see where the water comes in. From the back? Tail lights. From the top? Trunk seal.


  • naedrnaedr Posts: 5
    Thanks for the info. Does the factory install a rubber seal around the tail light assembly? If so, does the caulking go on in place of or in addition to the factory seal?
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 44,403
    Just lay it over the rubber seal with your finger and then clean up the excess after you install the tail light assembly.


  • naedrnaedr Posts: 5
    Thanks again!
  • I am having the same problem. Water comes into the AC compartment and drips out through the blower motor. I've removed the blower and don't see anything obvious. I've figured there must be a drain that is plugged. Does anyone have any ideas? I've already fixed the rear lights leak a couple of years ago so that is not the problem.
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 44,403
    Yes the AC has a drain, usually you can see it through the firewall if you lift the engine lid. It is supposed to take condensation to the outside of the car and let it drip onto the ground.


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