What Causes Water Leakage on the Floor Mats in a BMW 3 Series Cabin?

1 Answers
JackLee
07/30/25 10:32am
Water leakage on the floor mats in a BMW 3 Series cabin is mostly caused by issues with the waterproof strips, such as poor adhesion, aging, or cracking of the rubber seals, allowing rainwater to seep in. Reapplying adhesive specifically designed for waterproof strips can completely prevent leaks. Here are the details: 1. Loose Door Seals: Rainwater may enter the cabin due to improperly sealed door weatherstrips. 2. Clogged Drain Holes: Blocked drainage holes on either side of the U-shaped channel beneath the windshield can cause rainwater to enter the cabin. 3. Sunroof Issues: Check for aged seals, clogged sunroof drainage holes or pipes, or damaged air conditioning drainage outlets. If previous leaks were identified, they should be addressed again. Start by inspecting for water ingress. Excessive moisture inside the car usually indicates standing water somewhere in the cabin.
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