I have a leak on .the driver's side .

Here is the order of locations I would check for leaks: 1) Sunroof / moonroof drain tube restriction (if equipped with an opening roof panel) 2) Windshield urethane sealer leak - if the windshield has previously been replaced 3) body seam leaks, weatherstrip leaks Water testing around various areas is needed to see where the water is entering the vehicle.