BMW 540i rear and front passenger floor gets wet due to unsealed vapor barrier in the door on BMW 540i

Some BMW 540i owners report experiencing water leaking into the interior of the car, resulting in wet front and rear passenger floors, which may be attributed to an unsealed vapor barrier in the door. This issue can lead to significant water damage if not addressed promptly. Owners are advised to inspect the vapor barrier for any signs of tears, gaps, or poor sealing that could allow water to seep through. If any damage is found, it is recommended to repair or replace the vapor barrier to ensure proper sealing. Additionally, it is crucial to dry the wet floors thoroughly to prevent mold and mildew growth, using fans or dehumidifiers as necessary. Taking these steps can help maintain a dry and damage-free interior in the BMW 540i.