Car Water Leaks - 5 most common causes Video

Car water leaks can be frustrating, but identifying common causes can help you resolve the issue or know when to seek professional help.

This video highlights five of the most frequent culprits and offers practical advice for DIY fixes. Below is a summary of the key points discussed:

1. Blocked Sunroof Drains
   Sunroof cassettes have small drainage hoses to channel water out of the car, usually down the A-pillar and into the wheel arch. These can become clogged with debris, leading to leaks. They can also shrink over time and pull off their plastic connectors, which are only a press fit. This is why you should avoid using compressed air, as it may blow the hose off behind the dashboard. Instead, clean carefully with a pipe cleaner or remove blockages from both ends.
    
2. Scuttle Area Build-Up
   The scuttle, located below the windscreen where the wipers sit, can collect leaves and debris, blocking drainage points. This can cause water to pool and seep into the car. Clean the area thoroughly, including the air intake and pollen filter, and ensure drainage channels are clear.
    
3. Damaged Door Membranes
   Doors have a vapour barrier to separate the exterior from the interior. If the membrane is damaged or water escapes from blocked window drains, it can seep over the threshold and onto your carpets. These membranes tend to perish as they get older, shrink, and pull away from the sealant. Test the drainage by pouring water down the window and observing where it exits.
    
4. Rear Vent Leaks
   Most cars have air vents behind the rear bumper to allow airflow through the cabin. These vents can develop leaks if their seals degrade. While sealing them with adhesive is a temporary fix, replacement of the part and refitting with the correct sealant is recommended.
    
5. Faulty Gaskets and Seals
   Door seals, light gaskets, and other rubber components around openings can age causing shrinkage and for them to harden, leading to water ingress. Ensure these fit properly and replace any that are worn or damaged.

If you've tried addressing these issues and still have water ingress, or if drying and decontaminating the interior feels overwhelming, our expert team can help. At New Again, we offer carpet drying, decontamination, and a comprehensive 29-Point Leak Detection Check to identify and fix any leaks professionally.

Need help with a water leak? Call us today for advice or to book your car in for an assessment.