How to Deal with Water Accumulation in the Car Caused by Sylphy Sunroof Leakage?

[JulianLee]

First, address the sunroof leakage issue by checking if the window waterproof strips are aged or loose, and replace them if necessary. There are four drainage pipes at the four corners of the sunroof that direct rainwater out of the car through the A-pillar and B-pillar to prevent clogging.

[RichardMarie]

I just dealt with a sunroof leakage issue on the Nissan Sylphy. If you find water accumulation inside the car, immediately use a towel to soak up the floor water stains, lift the carpet to dry it thoroughly, otherwise it may cause mold and corrode the circuits. Focus on checking the four drainage holes of the sunroof, use a thin wire to unclog any blocked passages, commonly caused by leaves and mud leading to water backflow. Aging and cracking of the sealing strip is also a major cause; you can find cracks by running your fingers around it, and replacing the new sealing strip costs just around a hundred yuan. If the drainage pipe joint comes off or the sunroof frame is deformed, you need to go to a specialized repair shop. Finally, remind everyone to clean the sunroof grooves before the rainy season to avoid water overflow.

[VonAshley]

Last year during a heavy rainstorm, my Sylphy had 3cm of water accumulated inside the car - a lesson learned the hard way. Immediately used dry towels and a vacuum to remove the water, spent two full days removing seats and sun-drying the carpets. In 90% of cases, leaks are caused by clogged sunroof drainage pipes - use a bicycle brake cable to clear the pipes, then pour a bottle of mineral water to test drainage speed. If the weatherstrip is cracked, remember to order OEM parts online and replace them yourself, saving half the cost compared to dealership service. Monthly maintenance should include cleaning sand from sunroof rails and using alcohol-dipped cotton swabs to clean weatherstrip gaps. For window film, choose UV-protective type to slow rubber seal aging.

[OWyatt]

To fix a sunroof leak, follow three steps: Use an air gun to clear clogged drainage holes; temporarily repair failed seals with 3M tape; remove seats and dry the chassis if water accumulates inside. A common issue with the Sylphy is sludge buildup at the front drainage pipe bend—pouring white vinegar can dissolve it. Wear rubber gloves to prevent cuts during DIY repairs; if large water stains appear on the headliner, frame deformation may require professional service. Check track cleanliness by opening the sunroof every two weeks, and avoid direct high-pressure water spray on seals during car washes.