Replace your worn external dew sweeps, the rubber weatherstripping that is prone to cracking, They are located on the outside of the side windows on top of your door. This is your first line of defense against the elements. They prevent moisture from getting inside your door shell & causing rust. Note that this does not replace the wide chrome & is only the rubber. The old rubber will have to but removed & the new installed to the wide chrome molding.
Inner & Outer DS & PS