Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
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KHLOW2008
CAR REPAIR CONTRIBUTOR
41,814 POSTS
The sunroof is not completely waterproofed and water would get past the seals. That is the reason for the drainage channes on all 4 corners. When leaking occurs, the drainage channels are clogged allowing water to accumulate.