What Causes the Sound of Water Sloshing in the Car Door?

2 Answers
DelAaliyah
07/25/25 6:52am
The sound of water sloshing in the car door can be caused by blocked drainage holes at the bottom of the door or gaps in the door. Below are solutions for the sound of water sloshing in the car door: Blocked Drainage Holes: First, inspect the car door. It may be that the drainage holes at the bottom are blocked by mud or sand, preventing rainwater from draining out. The drainage holes need to be cleared. Gaps in the Door: Sometimes, when parked on the roadside, cars frequently have cards inserted into the door. Over time, this can create an invisible gap in the door, allowing rainwater to seep inside. If the amount of accumulated water is not too large, it may not be a major issue. However, excessive water accumulation can lead to electrical faults in the door, requiring repair at a 4S shop.
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VanCameron
08/10/25 6:20pm
I've been driving for over a decade and have encountered the annoying issue of water sloshing inside car doors several times. The most common cause is water leaking into the door cavity through window gaps after rain or car washes, accumulating there with no way to drain out. The drainage holes at the bottom of door cavities are designed too narrow, easily clogged by mud or leaves - you'll hear the water sloshing when shaking the door. Another reason is aged/cracked window seals or improperly installed weatherstripping allowing direct rainwater ingress. While not a major problem, it should be addressed promptly as accumulated water causes internal rusting, affecting door operation and shortening lifespan. The simplest fix is checking the door's drainage holes - use a soft hose to flush them or carefully unclog with tools. If sloshing persists, consider replacing seals or inspecting for structural damage, ideally having technicians check during routine maintenance.
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