I have a 2002 M5 with 74,000 miles. The problem; I have a water leak issue in the rear door panels. Allow me to attempt to explain- When it rains, water runs off the window around the door track. The rear *floor board area has puddle of water [Where you place your feet while seating].

In July of 2006, I replaced the rear left & right door insul-BMW part number # 51-48-8-230-221. As you know, the BMW mechanic removed both rear door panels and removed a black thin lining-I believe it keeps the water outside. Hopefully, you can help me with this unnerving problem. Once again, when it rains, it really ruins my day…

Thanks

PS-Please help me with this problem-can you say M5 in garage????