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Re: Leaking water
Most models have two drain holes in the corners of the sunroof opening. You'll need to open the roof and have a squint into the corners. The drain holes are connected to tubing which eventually finds it way into the wheel arches. If these block rain water can spill over into the roof lining and then downwards into the boot area.
Likewise the front sunroof wil have a similar arrangement where the drains run into the front wheel arches. Try probing them with a soft piece of wire - a piece of stretchy curtain wire is ideal. Try squirting water into the holes using an old dishwashing liquid bottle and hopefully water should then emerge at the wheel arches. If not get back to me.
Currently in madnoel10's garage:
Honda Civic 1.4l