Question about 2001 BMW 325

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Rain water leak on rear floor board on 03 530I

I have a water leak problem after changing the outer trim molding to black. It leaks on the floor in the rear on both sides. What can I do to stop the leak? 2003 530I

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Water leaks are a nightmare. At least in your case, you know what you changed when it started. I believe that this should be your fix. The outer moldings are there to stop leaks and such. When you had the molding replaced, it has not sealed back into place properly, so it has not been blocking all water from coming in. First, I would remove the molding, and try again. Be slower at it, and be sure to have everything flush. If this does not fix your water leak, than simply do it one more time, only this time, use a caulking that is recommended on vehicles, and line the space your molding runs along, so when you put the molding back in, it will seal better. Be sure the caulking you will use does not expand when it dries, or gets wet, and by all mean do not use gorilla glue, that stuff expands as it dries. Also be sure not to use an excessive amount of caulking so as to be sure it does not ooze outward past your molding. By the sounds of it, since your water leak is only on the rear, I would start by doing this with the back only. However, because of the way cars are designed under all of those pretty interior panels, water could be leaking in from the front molding seals, and running backwards towards the rear seating before it runs down to the floor. Of course this would be the obvious fix, however the water leak could have just started after you replaced the molding, this could be just a coincidence, and this may not fix your water leak if the problem is else where. If you cannot find the solution on your own, take your car to a dealership. Dealerships may be more expensive, but they will take care of your problem, and your car. And if they haven't fixed your problem they are obligated to find and fix the issue.

Posted on Sep 27, 2009

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First make sure that the new molding is the the same size as the old one if it is make sure that its securely fastened to the body of the vehicle if all of these things are good you may have to make sure that the doors are not out of alignment.

Posted on Oct 03, 2009

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