Water Leaks in Car When It Rains (Common Causes and DIY Fixes)

Water leaks in a car when it rains are a common problem. Many car owners have experienced water leaks in their vehicles when it rains.

This is a common problem that several different things can cause. One common cause of water leaks in cars is due to poorly sealed doors and windows. If your car’s doors and windows are not correctly sealed, they can allow water to enter your car and cause serious damage to your vehicle.

Other common causes of water leaks in cars are a faulty or damaged windshield. If your windshield is cracked, chipped, or otherwise damaged, it can allow water to seep in through the cracks and enter your car.

In some cases, a leaking windshield may also result from a faulty sealant around the edges of the glass.

Reasons Why Water Leaks In Car When It Rains

1. Clogged Sunroof Drains

If your car has a sunroof, that’s probably the source of the leak. Sunroofs have drains that are supposed to carry away any water that gets in, but these drains can become clogged with leaves and other debris over time. The water has nowhere to go except into your car when this happens.

To fix this problem, you need to clear the clogged drains. This is a pretty easy task that you can do yourself. Just follow these steps:

Tools and Materials:


  • Wire coat hanger or similar flexible wire
  • Water hose with spray nozzle attachment


  1. Locate the sunroof drains on your car. These are usually located near the corners of the sunroof, and may be hidden behind trim pieces.
  2. Use a pair of pliers to remove any debris blocking the drain holes.
  3. Straighten out a wire coat hanger or flexible wire, and insert it into the drain hole. Push it through until you feel resistance, then pull it back out. Repeat this step a few times to clear any remaining debris.
  4. Attach a water hose with spray nozzle attachment to a faucet, and turn on the water. Place the nozzle into the drain hole, and let the water run for a minute or two. This will flush out any remaining debris and help ensure that the drains are clear.
  5. Replace any trim pieces removed during this project, and test the sunroof drains by pouring some water onto the sunroof itself. The drains should immediately remove the water from the surface of the sunroof. If they don’t, repeat steps 2-4 until they function properly.

Clogged sunroof drains are the most common cause of water leaks in cars, but they’re not the only possibility. If your car doesn’t have a sunroof, or if the problem persists even after you’ve cleared the drains, then there are a few other possible causes to investigate.

2. Clogged Wiper Cowl Drains

Most of the time, when it comes to wiper cowl drains, all you need to do is clean them out. Over time, leaves and other debris can clog up the drains, causing water to back up and potentially leak into your vehicle.

To clean the drains, simply remove any debris blocking them and then flush them out with water.

If the drains are severely clogged, you may need to use a plunger or a plumbers’ snake to clear the blockage.

In some cases, you may need to replace the entire wiper cowl assembly if the drain holes are damaged beyond repair.

3. Faulty Windshield Gaskets

Windshield gaskets are the rubber seals that fit around the edges of your windshield.

They are an important part of your car’s structure as they provide a seal between the windshield and the car’s body, keeping out water and debris.

Over time, these gaskets can become brittle and cracked, allowing moisture and debris to enter your car’s cabin. This can impede your visibility while driving and lead to other problems like water damage or rusting.

The gaskets will need to be replaced to fix the problem in most cases.

Gasket replacement is a simple process that anyone can do with a few tools.

To replace your windshield gaskets, you’ll need:

  • A Phillips head screwdriver
  • A putty knife
  • Caulk gun
  • Windshield sealant
  1. Start by removing the old gasket material. Use the putty knife to scrape away any old sealant or debris. Be careful not to damage the glass beneath the gasket.
  2. Once the area is clean, apply the new sealant. Use a caulk gun to apply a generous bead of windshield sealant around the edges of the glass.
  3. Install the new gaskets. Put the new gaskets in place and use the screwdriver to secure them. Make sure that the gaskets are properly sealed to prevent leaks.
  4. Allow the sealant to dry for 24 hours before driving your car. This will give the sealant time to set and create a watertight barrier.

4. Faulty Gaskets

Car window/door gaskets are an important part of your car’s windows/doors. They provide a seal between the glass and the window frame, keeping out water, dirt, and other debris.

Over time, these gaskets become worn or damaged, allowing water and other elements to enter the car.

If you have a car with damaged or missing window gaskets, it is important to replace them as soon as possible to prevent further damage to your car.

There are a few signs that your car window gaskets may need to be replaced. If you notice any cracks or holes in the gasket, or if the gasket is no longer sealing properly, it is time for a new one.

In addition, if you see water or other elements inside your car after a rainstorm, likely, the gaskets are not functioning properly.

If you need to replace your car window gaskets, you will need to purchase new ones from a auto parts store or online retailer. Be sure to measure the old gasket before ordering the new one to get the correct size.

Once you have the new gaskets, simply follow the instructions on the packaging to install them. In most cases, this is a simple process that only takes a few minutes.

However, if you are unsure about replacing the gaskets, it is always best to consult with a professional mechanic before attempting the repair yourself.

What to Do If Water Leaks In Car When It Rains

If you find water leaking inside your car, it is important to take action immediately to avoid further damage. Here are a few things you can do:

  1. Locate the source of the leak and try to fix it if possible. If you cannot fix the leak or are unsure where it is coming from, you should take your car to a mechanic or auto body shop for repair.
  2. If the leak is coming from the windshield, try to dry it off as much as possible with a towel. If the leak is coming from elsewhere in the car, such as the dashboard or doors, try to open them up and let the air circulate to dry out the moisture.
  3. If the leak has caused any wetness or dampness on the car seats, try to dry them off as much as possible. You can also use a hair dryer on the low setting to help speed up the drying process.
  4. If the leak has soaked into the carpeting, you must remove it and clean it. First, vacuum up any water you can and then use a wet/dry vac to suck up any remaining moisture. Next, use a carpet cleaner or shampooer to clean the carpeting. Finally, let the area dry completely before replacing the carpeting.
  5. If you have any electronics in your car, such as a stereo or GPS, remove them and keep them in a dry place. Water and electronics do not mix.
  6. If the leak has caused any mold or mildew to grow, you must clean and disinfect the affected areas. Use a bleach mixture and water to scrub away any mold or mildew, then rinse the area with clean water.
  7. Once you have taken all of these steps, you should take your car to a mechanic or auto body shop to have it checked out and repaired.

Leaks can cause serious damage to your car if they are not fixed, so it is important to have any leaks repaired as soon as possible.

Water Leaks in Car When It Rains- Authors Notes

Water leaks in your car when it rains can is not only a cause for concern but can cause damage to your car.

If you experience water leaks, it’s highly recommended you first confirm the potential culprit and fix it as recommended above.

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