My moonroof is stuck open because a piece broke off.
The tracks in a moonroof are made of hard plastic. Over time the plastics becomes dry and brittle making it prone to breaking. Debris from twigs and leaves can also cause the moonroof to bind and break-off its plastic pieces. A certified mechanic can help determine the cause of the broken moonroof and offer a suggestion for an appropriate repair. Sun roofs can be tricky since access is limited. So it is best serviced by a mechanic.
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