Pull the rubber part off and there will be screws that hold that plastic piece onto the car. Replace that weatherproof seal with some seals you can buy at lowes. I did this two years ago and I have had no problems since and I have had every leak possible on this car but all is well now
Thank you sir! found the torx screws holding the trim. 17K mi and the foam seals are gone!! I replaced both sides. Thanks again for the tip.