Why Does a Car Sunroof Leak?
2 Answers
Car sunroof leakage can occur due to the following reasons: 1. Clogged drainage holes: When the drainage holes are blocked, rainwater cannot drain out in time and may overflow, soaking the interior trim panels around the sunroof or the sunroof switch. 2. Issues with the drainage pipe: Leakage can result from a cracked or leaking pipe, excessive bending of the pipe, or aging of the pipe. 3. Problems with the sealing strip: Rubber seals can actively block rainwater and dust to some extent, seal the interior space, and provide some sound insulation. However, when damaged or aged, they may worsen water seepage.
I've driven several cars with sunroofs and encountered leakage issues multiple times. The most common cause is clogged drainage holes around the sunroof due to leaves or dust buildup, preventing rainwater from draining properly and causing overflow. Another issue is the rubber seals - they harden and become brittle over time from sun exposure and weathering, losing their elasticity and compromising the seal. I remember one leakage incident was caused by cracks in the seal, allowing tiny water droplets to slowly seep into the headliner, eventually causing mold growth. Now I inspect my sunroof quarterly, opening it to remove debris with a small brush, which works well. Don't ignore this issue - delayed treatment may damage interior trim or electronic components, leading to expensive and troublesome repairs. Simple maintenance can prevent major problems, and I recommend everyone learn to do it.
