My door ajar light keeps coming on and both the driver and passenger door windows "think" the door is ajar because they will not close all the way. I have done the re-calibration method in the manual numerous times, and occasionally, when I close the doors, the ajar light does go out and the windows do close. So I think the window behavior is working correctly but the door sensors are shot. Just ordered one to try for passenger side. Any others out there have this issue? How difficult was it to swap out sensor? Any tricks? Thanks!