My 2004 Montana collects water/liquid under the drivers side carpet even if it doesn't rain. What could be the problem?
Is the A/C on maybe your A/C drain is backing up into the van, check the floor board on the passenger side too
The water is entering from the air filter. There is a little plastic deflector above your cabin air filter. If it is not properly fitted, water will pour in the passenger side. It's an easy fix.
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