How do I rid my 2007 MX-5 of excessive interior moisture?
Under both floor mats and under the carpet in the truck I often find that area is damp to wet. It does not appear to be due to a leak for the seats and the rest of the interior are dry. The soft top is in good shape.
You need to remove the interior carpets and pads and hang then up to dry, while they are drying locate and repair the leak, it could be the A/C drain is plugged, or the heater core is leaking if it smells like coolant, windshield seal leaking, convertible top rear drains, check it over thoroughly or your problem will return, excessive moisture will start corrosion in the floors and can damage electronics. Good Luck.
Rear rain rail is a common leak spot especially on cars older than 10 years.
soft top rain rail
Had the same problem with my 2007 MX-5. There is what I call an intricate drainage system beginning at the back/bottom of the soft top. Runs all the way down to the bottom. Miata did not do a recall, however posted detail on repair. Just a matter of cleaning. The system get full of debris.
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