If you've had the speakers replaced then its probably coming in through there. Water goes along the bottom of the window and in behind the mirror then is supposed to flow out the bottom of the door. If the speakers have been changed then most of the time theres a gap at the bottom of the speaker and the water will follow the speaker to the lowest point, which of course is inside the door panel. Then it leaks into the cabin.
2009 Ford Escape Limited - 3.0L, 6 speed auto, 4x4, 25/33 city/hwy imp mpg.
2017 F150 XLT-XTR - 5.0L, 4x4, 3.55's, E-locker, xtr chrome package, fx4 off-road package.
20/25 imp mpg