Car Problem Reports

BMW 530i Heavy rain causes water to collect on rear floor boards

BMW 530i Problem
12 Reports
Me Too

Model Years Affected: 2002, 2004

Average Mileage: 133,750 mi (89,000 mi - 220,000 mi)

  • wcraft, , 113,000 mi

    During a heavy or prolonged rain (or carwash) water collects on the rear interior floor boards. There appear to be two major causes for this - mine had the more frequent of the two. One is that the sunroof drains can get clogged. The drains run down the c-pillars just behind the rear doors and if clogged the water backs up and runs down onto the floors. The other, more frequent issue is a torn or unglued noise baffle/vapor barrier that is in each rear door. Rain water goes down inside the door at the bottom of the glass and that vapor barrier directs the water flow to a drain at the bottom-front of the door. The glue/sealant that holds that barrier to the door frame can go bad - when that happens the water goes inside the car rather than down the drain. Re-seal the barrier and the problem goes away. Be careful to do research, or take it to a pro if you have rear door airbags - if they deploy while your head is in front of the door it can kill you. For a car w/o airbags like mine - it took me about 20 minutes for each rear door to remove the door panel and put new sealant on the barrier.

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  • Visitor,

    I had this problem twice: once on each side of the back seat. It was due to faulty plastic seal in the doors.

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  • Visitor, , 180,000 mi

    Rear driver side floor gets wet in heavy rain, was the vapor barrier.

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  • Visitor,

    after washing the car or when it rains. water will collect in the bottom of the door frames

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  • Visitor, , 148,000 mi

    Rear driver side carpet soaked.

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  • Visitor, , 89,000 mi

    I just purchased my 2002 BMW 530i, and just realized the problem! When there is heavy rain, the floor in the back gets saturated! I have no idea how to fix this!

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