Will water accumulate inside the car if the sunroof drain hole is clogged?

[DeAmelia]

It can lead to water accumulation inside the car. Once the vehicle's drain holes are blocked, the drainage speed slows down, resulting in a large amount of water being stored inside the car. Some water may flow into the interior through drainage pipes, damaging the upholstery and electrical components, and even causing body rust. Below is relevant information: Fuel tank drain hole: Open the fuel tank filler cap to see the drain hole located beneath it. Since the fuel tank cap is not completely sealed and is recessed inward, a drain hole is designed. As vehicles are used outdoors, windblown sand and debris can accumulate around the fuel tank cap through gaps. Sunroof drain holes: Generally, if the sunroof is not opened frequently, the four sunroof drain holes are unlikely to get clogged. Even if one is blocked, it usually doesn't cause water to flood the car. Most water ingress occurs due to seepage through rubber gaps. Damp interior panels are a sign of clogged sunroof drain holes. Detached sunroof drainage tubes can also cause interior panel dampness. Moist upholstery not only produces unpleasant mildew odors but also fosters bacterial growth.